A hydraulically actuated powertrain control device that squeezes friction and reaction plates together to either drive, (input), or hold a planetary gear component stationary. Tech A. One-way clutches can be either one-way rollers or sprags. sprag bearing overrunning clutch. one-way roller clutch ML series. The wedging of the sprags between the races transmits power from one race to the other . The two common industrial radial-roller clutch styles are called a sprag and a ramped roller. sprag one-way clutch FR series. , Which of the following was used in early automatic transmissions? and more. On both of these units, this one-way clutch holds in 1st through 3rd gears and freewheels in 4th gear. Also known as drawn-cup roller clutches. In 1973, Sauzedde [ 1 ] wrote a paper that is commonly considered the benchmark document on roller One-Way Clutch (OWC) analysis and design. Types of One-Way Clutches. In the years since, we have seen this technology advance and now one-way clutches are used in everything from hay balers to helicopters. 2 Nm - 835 Nm. keyless transmission elements » locking assemblies » shrink discs » locking elements » taper lock. One way to gain element quantity is through overall diameter, as is the case with the A761E and AB60E F3 sprag assembly (Figure 7). If Rollers fell out someone prior used your C4 Corvette to its full capabilities. A band can be used to hold or drive a planetary gearset. Technician B says that a one - way clutch could be installed upside down and cause the automatic transmission/transaxle to not function correctly. Which technician is correct?, Two technicians are. 12, pp. double wrap. A sprag is a kind of clutch that will turn in one direction but not in the other. Will also look at tightening up the band clearance. The second is a machinist forum regarding a bidirectional roller clutch,. Which technician is correct?, Two. When any one race of the unit rotates in one direction, the sprags get automatic released (because of change the. Single-row bearings do not support loads from any direction. Technician A says that bursting of clutch friction facings is often caused by coasting a truck with the clutch pedal depressed. The one-way clutch has a close relationship with torque converter, especially for the stator, and its geometry structure and the basic components can be seen from Fig. Technician B says that a one - way clutch could be installed upside down and cause the automatic transmission/transaxle to not function correctly. - riding the clutch pedal. Above center: Each roller is guided by a single spring and inserted by hand into the sprag. As a result, it is installed in descending order (upside down). Allows for a compact design. It is possible to adapt the design of sprags and cage to get significantly different characteristics from one model to another. Torque: 70 Nm - 2,300 Nm. The odd thing is that the 4L80-E overdrive roller clutch seems to fail more often than that of the 4R100 during extreme use. Several different types of one-way clutches are in use, these include: Roller designs; Sprag designs; Spiral designs; Diode designs Basic Designs. Either a one-way sprag or a roller clutch is used in the stator assembly. and Y. Usually ships within 6 to 10 days. 09 mm. A 500 904 GM TH M 200 200C 2004R 325 3254L Low Roller Sprag New. c. PP are sprag type freewheels integrated into 62. Sprags One-way rollers Both A and B Neither A nor B Sprags Technician A says preload refers to the amount of force placed on a bearing before any load is on the bearing. Different kinds of one-way clutch are distinguished by their torsional medium, such as roller, sprag, and wrap–spring. 0L and 2. Tech A B. The ribbon spring (16) defines a plurality of. - 1 1/2 inches. None of the above. INTRODUCTION There are three major types of One-Way Clutches (OWC): roller, sprag, and pawl. This CSK40PP one-way ball bearing with sprag freewheel backstop clutch is made of chrome steel, is double shielded, and has a steel. I normally leave the washer alone and cut the front of the planet to suit. Among other topics, Sauzedde led the reader through analyses on contact stress, outer ring hoop stress, and roller centrifugal force computations. One-way clutches can be either one-way rollers or sprags. Correct interference dimensions must be maintained to obtain maximum bearing and clutch performance. Sprag Clutch vs Roller Ramp Clutches; Sprag Clutch Springs Guide; Torque and Hertzian Pressure Guide;. I normally offer the customer either option, of course the roller is a cheaper option but if it craps, the sprag is the upgrade and the initial savings were not worth it. Tech B says that sprag clutches must be serviced as a. Technician B says that one or more of the transfer case bearings could be defective. It resembles a roller bearing but, instead of cylindrical rollers, non-revolving asymmetric figure-eight shaped sprags, or other elements allowing single direction rotation, are used. Freewheel bearings are characterised by their ability to only turn in one direction which. If the sprags don’t maintain that constant contact, the clutch could. So the only way to turn its fuction off is to lock the member that is rotating by some other means. Sprag clutch bearings allow your application to turn one way whilst locking in the opposite direction. The bigger the races, the. The one-way clutch usually applies in a variety of powertrain torsional system, such as air turbine starters, vehicle, and rotorcraft. Part Number: TCI-373601. Types CSK. Compatible with medium loads and easy to install. The front wheels C. Our one-way sprag clutches are great for applications with low to high torque capacity. Therefore, when the sprag clutch is holding it allows the 3rd clutch drum to drive the input sun gear. It resembles a roller bearing but, instead of cylindrical rollers, non-revolving asymmetric figure-eight shaped sprags, or other elements allowing single direction rotation, are used. Rear drum, rear planetary and rear one way sprag - Another problem area. Indexing clutches are often used for applications. The front wheels C. A torque converter is being discussed. In this application the Whenever the forward clutch is applied, and the sprag assembly is installed between the outer race and forward sprag clutch assembly is holding, power from inner race in such a way that the inner race and sun the converter and turbine shaft is transferred to gear are forced to. BD Diesel Heavy-Duty One Way Sprag Clutches 1060603 One Way Sprag Clutch, 68RFE, Dodge, RAM, Each. Contact a supplier or the parent company directly to get a quote or to find out a price or your closest point of sale. Planetary gear. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright. 1st gear w/ transbrake disengaged - Direct clutches release, sun gear free to rotate anti-clockwise, rear band releases and lo-roller locks. Technician B says that one purpose of a multi-disc clutch is to hold one rotating member to another rotating member. Made in USA. 5725. Terms in this set (27) __________ can be either one-way roller or sprag. Bearing Clutches. For applications that may exceed the capacity of a roller clutch or a sprag, the mechanical diode is the ultimate high-strength solution for one-way stator clutches. Tech B says that the clutch must slip slightly during engagement. Diameter: 25 mm - 110 mm. com 6 A Sprag Clutch is a free-wheel device having an inner race, and an outer race either of which can be the input or output member. A sprag-type clutch operates in a manner similar to the roller-type clutch. Technician A says a multi-disc clutch is a holding/application device in an automatic transmission. Our sprag profiles are designed to reduce drag and create less wear. A sprag and roller one-way clutch assembly (10) including an outer cage (12), an inner cage (14) and a ribbon spring (16) for use with a clutch having outer and inner races (70, 72). Allows for a compact design. These LLH Holdbacks designed for long life, as the name implies, and they are sealed to protect against airborne contaminants. The type of one-way clutch that uses rollers is called a sprag. Our sprag profiles are designed to. MISUMI. The wedge-raceway contact mechanical model, considering centrifugal force of wedge and the eccentricity of the inner ring and the outer ring of the one-way clutch, is established based on Hertz contact theory. 3. The excitation signal for our system is either a peri-A sprag functions as a one-way clutch and operates similarly to a ratchet tool from your toolbox. lever (examples) crowbar, broom, hammer, shovel, bottle opener. It unlocks, however, using a roll technique in which the inner and outer roller. Pipe Rollers - One-Way Clutch, with Bearings, Core Only. GM has evaluated various type of selectable one-way clutch such as roller type [2], and MD type [3] in 4/5-speed automatic transmission in which the low/reverse clutch and production roller or sprag were replaced with a selectable one-way clutch. This ID groove faces the low-clutch drum, NOT the high-clutch drum (figures 10 & 11). The sprag clutches don’t need any external control. c. In other cam-clutch designs, centrifugal force makes the bar cams turn into liftoff to disengage the clutch halves. -13% $3084. In the middle of rebuild and just used the one I. Who is correct? A. It is on and holding at low vehicle speeds, and re-routes some oil back to the turbine. for low to mid-speed and middle load applications. When the outer ring in the figure rotates counterclockwise relative to the inner ring, the sprag is pushed and inclined, leaving a. Only 5 left in stock - order soon. $98. Burning Rubber for 200-300 Feet off the line or at least tried too several times The Forward Sprag in our 700R4-4L60E transmissions work real hard & has a very important task. A sprag is a kind of clutch that will turn in one direction but not in the other. Roller ramp clutches require one of the surfaces to have ramps and holes for the springs to push the rollers up the ramps. Products. 2004-01-1151. A one-way sprag clutch prevents rotation from moving freely in both rotational directions. Indexing. Study with Quizlet and memorize flashcards containing terms like The torque-carrying capacity of a clutch is determined by:, When a multiple-disc clutch is used as a holding member, the lugs of the unlined plates are splined into, When a sprag clutch locks, the sprags and more. The heat treatment makes the race less brittle. 130. 6. Roller and sprag OWC can slip, but this is generally associated with failure. 8-inch Converter - High performance with stall speeds from 4000 to 7000 rpm as dictated by your engine combination. A heat treated intermediate sprag race is darker colored than a stock part. Type GFK - Ball and Roller Bearing Sprag Clutches The GFK clutch combines a sprag unit with a roller bearing and ball bearing into a unit which dimensionally equates to a 59 series bearing. The three main ways an application uses a sprag clutch to prevent this rotation are: Backstopping; Indexing The overrunning clutch, or freewheel, is a kind of universal part with a one-way drive character, and is widely used in machinery. Bolt in sprags were designed to repair damaged cases, and adapted by racers. Each sprag is essentially a strut placed between the races in such a way that it transmits power from one race to the other by a wedging action when either race is rotated in the driving direction. One way sprag bearing is a kind of bearing that can rotate freely in one direction and lock in the other direction. Compatible with medium loads and easy to install. . b. Study with Quizlet and memorize flashcards containing terms like Two technicians are discussing one-way clutches. c. 1 One-way clutch is also called overrunning clutch, which only transmits torque from the input to output. This type of bearing is usually supplied already filled with grease meaning it can be used straight away and requires little maintenance or additional grease before use. Vacuum Modulators (If Equipped) 1) Late shift 2) Early. Also notice the inner race has a black side (which is heat-treated) on top and a plain side on the bottom. One way clutches are used for different industrial machinery and vehicles. Stand the center support up on the bench with the rear end facing up. It can freewheel in one direction, but locks up in the other direction. It is possible to adapt the design of sprags and cage to get significantly different characteristics from one model to another. A one-way roller clutch or sprag is located inside the stator assembly. Eventually the impeller and turbine achieve approximately the same speed, and then the one-way clutch releases. A sprag and roller one-way clutch assembly (10) including an outer cage (12), an inner cage (14) and a ribbon spring (16) for use with a clutch having outer and inner races (70, 72). The internal elements are long enough and shaped so that one race can turn in one direction independently. GMN’s top radial ball bearings include our 6000 & 6200 series, both manufactured to ISO 15 standards. Axial loads transfer force in an equal, uniform. Whatever you call it, sprag clutches are a critical mechanical device in many heavy industrial applications—from automatic transmissions to torque converters, industrial winches to helicopter rotors. Freewheel bearings are characterised by their ability to only turn in one direction which. This educational video explains how the One-way overrunning or roller clutch works to allow rotation in one direction and prevent it in the opposite direction. James Halderman | Automotive Educational ResourcesThe output can be coupled to either one of the ring gears, with R1 being used in all forward speeds and B in the reverse speed. Their operation is similar in that they both rely on wedging the metal sprags between two races. When the engine speed increases, the centrifugal force allows the rollers to lift off from the shaft, and the level of friction in the one-way clutch drops to zero. Technician B says the pump is driven by the hub on the back of the converter housing. Diameter: 16. Just a couple points. ID (C) 15. The S-FC, S-FCB, S-HF, and S-HFL, S-RC, S-RCB Stainless Steel One Way Clutch Bearing Series consists of a drawn cup roller clutch with single or multi-rollers. Who is correct? both The dual mass flywheel has which of the following features? absorbs engine vibration Oil on the. Add To Cart. The input can drive the output in a chosen direction and permit the output to. It is a mechanical device that allows rotation in one direction but not the other. The paper explained both the static and dynamic behavior of roller One-Way Clutches (OWC), and described the practical application of esoteric stress equations to the design of roller OWCs. Like seemingly all hubs that use a one-way bearing or sprag clutch, the weight of the rear hub is on the heavy side at 475g for the. A band can be used to hold or drive a planetary gearset. sprag one-way clutch FR series. The odd thing is that the 4L80-E overdrive roller clutch seems to fail more often than that of the. Extremely harsh shifts from P or N, normal shifts at WOT: EPC (Electronic Pressure Control) solenoid failed. More than 2000 standard model of one way bearring over 1000 designations of metric and inch series needle bearings are regularly. Torque: 70 Nm - 2,300 Nm. First design carriers also use smaller diameter pinion pins. Everywhere else - Lo-roller unlockedProduct Description. The steel. Sure they are high $$ items but a helluva lot less than a prosthetic leg. If I was to run a 514 with a blo-thru set up I sure would make that trans bomb proof. This clutch is a freewheeling device with an inner race and an outer race, either of which can be the input or output member. The recommended mounting tolerances are h6 on the shaft and H6 in a rigid housing. I know how the normal grab clutches work that are splined to the ring gear, and how they are actuated and what they do, but I can’t seem to quite understand just exactly how the one way clutches work. Compatible with medium loads and easy to install. The roller clutches are available with and without bearing supports. Study with Quizlet and memorize flashcards containing terms like Two technicians are discussing one-way clutches. b. What type of planetary gear set has a set of long and short pinions?A sprag clutch bearing is a one way freewheel clutch that turns in a single direction. Sprag clutches operate against smooth cylindrical surfaces. The ribbon spring (16) defines a plurality. An imperfection will weaken it, which can cause it. The normal contact stiffness of the sprag one-way clutch is calculated by Newton iterative method. 3. This imbalance can occur due to uneven distribution of weight on the tire or a misalignment of the tire and wheel assembly. Can be used with either sprocket wheel sets or belt tensioning rollers (sold separately or as complete assemblies). Company Introduction: Changzhou Lisongtai Industrial Motion Technology Co. Cylindrical roller bearing(NU10 series, NJ2 Series, N3 series, NN series) 6. both d. In principle one-way bearings can be found with the most diverse functions. It unlocks, however, using a roll technique in which the inner and outer roller. Either race may be the driven member or driving member . , The apply device that is most commonly used as a driving member is a _____. Features. Rotational speed: 160 rpm - 600 rpm. Rotational speed: 160 rpm - 600 rpm. OWC also tend to change state very rapidly, generally between 5-50 milliseconds. The industry has marketed and sold for many years what others call a “billet”, “heavy duty”, “upgraded”, “formula one”, “high performance”, “metal”, “spring and roller clutch” and various other terms. To maintain a strong connection between two discs. Industry Part ID: DOAZ-7AO89A, A36654AK, 36654, 2538671, K36960. On the other hand, a. The sprag type one-way clutch is characterized in that its rotation is limited to one direction only. Then fork movement in either direction slides the release bearing along the transmission hub sleeve. Supplies 3Rd gear. This paper introduces a new multi-plate clutch system that allows freewheeler shifts without the need for conventional roller or sprag type clutches. When set in the one-way mode, the Multi-Mode Clutch holds torque in one direction, but releases in a controlled, self-synchronized manner when the direction of torque reverses. Usually, a crank mechanism applies the reciprocating motion to the clutch. : 1,600 Nm (1,180. Then the sprag's one-way clutch allows it to turn freely with the whirling fluid of the impeller and turbine. In my experience the over run clutch, ie either a roller clutch or a sprag. These units are often referred to as freewheels, sprags, overrunning, backstop or one-way clutches, depending upon their application. Superior Ford AOD AODE 4R70W Automatic Transmission Spiral Plus Intermediate Sprag Ring Kit 4R75E. Tss45 Nss45 One Way Bearing Us045 As45 Manufacturer Sprag Clutch One Way Roller , Find Complete Details about Tss45 Nss45 One Way Bearing Us045 As45 Manufacturer Sprag Clutch One Way Roller,One Way Bearing Manufacturer,Sprag Clutch One Way,One Way Clutch from Other Bearings Supplier or Manufacturer-Changzhou Suma. When driven in one direction the sprag rotates and jams between the raceways which locks the raceways together. Planetary gear power flow that utilizes more than one gear set to produce the ratios. 591") OD (B) 35. Technician B says that an overdrive ratio is a ratio where the first number is less than 1. Check out the article “How a Sprag Clutch Works” if you want to dive into the technical details of a one-way sprag clutch. Technician A says that bursting of clutch friction facings is often caused by coasting a truck with the clutch pedal depressed. The extra torque generated can cause a converter to “balloon", or expand in diameter. one-way roller clutch ML series. -M. 6 – Stator With One-Way Roller Sprag 7 – Impeller Housing In addition to the destruction of the converter’s clutches, it can also suffer damage to the stamped metal fins of the impeller and. This. 4. Sprags are sized, shaped, and mounted in a way that causes them to wedge between the two races transmitting torque from one to the other when rotated in the drive direction. 981092. P and CSK. a supporting bar or shaft on which, or by means of which, a wheel or wheels turn. Allomatic one way clutches are full-hardened, individually loaded, and made with high-quality maraging steel that provide higher fatigue limits than stainless steel. za Office: +27 10 035 6037 or +27 11 425. Additional capacities can be added to mechanical clutches. The stator's overrunning clutch enables the stator to spin freely in one direction while keeping it from rotating in the other. 3. A sprag is a one-way roller clutch, also known as an overrunning clutch. GMN Sprag Clutch Insert Elements, 400 Series are the perfect cost-effective solution when you don’t need integrated ball bearing support and/or you need multiple sprag clutches. Technician A says that hydraulic clutches are used to drive or input a planetary gear component. transferring torque. Chat now. , The apply device that is most commonly used as a driving member is a ________. In this type of freewheel, the two races are cylindrical. ☒ True or ☐ False True or False question 41. *Input Drum & Turbine Shaft (4L65E's have a induction hardened Turbine Shaft) *Front Pump assembly with some mods. Reduce Harsh 1-2 Shift Damage. This Is A New Overdrive One Way Roller Clutch Aka Sprag. Never leave out the 1-2 checkball. One-way bearings are widely used in washing. Torque transmission is by press fit with outer housing to K6 tolerance and shaft to h6 or j6. Several different types of one-way clutches are in use, these include: Roller designs; Sprag designs; Spiral designs; Diode designsIt works with some sprung rollers and centrifugal force to grab the inside of a smooth race. Material Selection, geometry, and proper processing all play a critical role. This also makes them more expensive. Both A and B D. 2. When torque is applied, the sprag locks and prevents motion in one direction; however, when force is released, the sprag freewheels or allows motion to take place freely in the opposite direction. As a part of Stieber modular system it has a bearing. lb) Max. The pump housing will only orient one way, since there is only one area of the pump which has two bolts close together. b. A bolt-together unit can be serviced at the track by yourself. a. Rotational speed: 160 rpm - 600 rpm. The sprags have a greater diagonal dimension across one set ofProduct Description. Figure 3: 4L80-E Overrun Drum. Company Introduction: Changzhou Lisongtai Industrial Motion Technology Co. 95. Much less US with the one-way feature fitted. Study with Quizlet and memorize flashcards containing terms like The _____ connects the turbine shaft from the torque converter to the elements of the planetary gear train. A sprag is a one-way mechanical clutch used in many automatic transmissions as a method of allowing the transmission to smoothly change gears under load. If one considers the operation of a helicopter autorotation clutch, it would appear that a clutch with the centrifugal engagement property (ie, the clutch is energized by centrifugal force toward tighter. - a clutch is a mechanical component used to connect a prime mover's driving shaft to a driven shaft of a mechanical system. Step-by-step solution. If one considers the operation of a helicopter autorotation clutch, it would appear that a clutch with the centrifugal engagement property (ie, the clutch is energized by centrifugal force toward tighter. Will also go with the TransGo TCC Isolator-Conv Regulator Valve, and NOT use the Sonnax Servo release valve. Withstands force in any direction from alternately crossed rollers at 45 deg angles. A one-way sprag clutch assembly for use in an automatic transmission or slar application including an inner race (42), an outer race (44) having a pair of annular grooves (63, 68) cut in the interior surface (45) thereof, and a clutch assembly (41) having an inner cage member (46), an outer cage member (53) and an intermediate energizing spring (49), the cage. transferring torque. The pins for the rear band and band lever slide out of the back of the casing. 4. , The ________ connect (lock) a member of the gear train to the transmission case. Bearing and Linear Guide > . Non-separable bearings with either steel or ceramic balls & a standard contact angle of. For these reasons, studies on high-performance overrunning clutches have always been the focus of. Installation is simple, just remove the original springs and rollers and replace with the new ones in the kit. The inner ring is designed for unidirectional function without bearing support. 4597–4607, 2015. The idea of using a one-way sprag instead of a centre diff has a merit in motorsport I think. )The sprag clutch is a rolling-type bearing that uses drag rollers, which are activated by a spring that allows the element to rotate freely around another, until the moment the direction is reversed, since at that point it locks and it stop spinning. I always figured there was a trade off between the size of the head and the torque holding capability of the one-way bearing, regardless of how it is implemented (spring wound clutch, sprag clutch, roller bearing clutch, etc. Spherical ball bearing(230 series, 222series, 223series) 11. One-way roller clutches and one-way sprag clutches are the two forms of one-way clutches. Thick cold oil and old slightly sludgy parts and a cold battery make this much more likely on a cold day. The 68RFE low reverse sprag is commonly known to flip its dog bone sprag struts and fail. The needles in these bearings roll freely in one direction, but lock to transmit torque when the rotation of the shaft is reversed. Freewheel bearings are characterised by their ability to only turn in one direction which. Buy Spring & Roller Clutch Sprag Kit, Low/Overrun, fits C4 & C5 1964-1986. The type of one-way clutch that uses rollers is called a sprag. There are at least two types- one is smooth and can be used w/the "HD" 34 element sprag. Reply Like. Study with Quizlet and memorize flashcards containing terms like Technician A says that when an automatic transmission/transaxle shifts into overdrive, the output shaft is rotating faster (higher RPM) than the engine crankshaft. An indexing sprag clutch can also be an added safety precaution in case of a motor or electrical failure. 51 mm - 56. Two oneway clutches are used in the Simpson Planetary Gear Set. I think what I’m confused about is what they actually. with internal bearings full-face indexing. In reality, all of these sprags are not much of an. A sprag clutch consists of a series of tapered rollers that are held in place by a cage. This means that roller ramp clutches typically must be provided with inner and outer rings to incorporate the ramps, while sprag clutches can operate directly. CSK20PP One-Way Bearing Sprag Clutch Freewheel Backstop Keyway FK6204PP. The wedging of the sprags between the races transmits power from one race to the other . But all THAT said, let me tell you what FORD did here in the 5R. 519-453-4318. Features ・Uses a cam and roller structure where rollers s. Sprag Roller Clutch, Fits TH700-R4 4L60E 4L60 4L70E TH-700, Low/Reverse, 1987-Up. Overrunning clutch can be either roller type or sprag type clutches. One way Clutch. Bands and roller clutches are holding members. If the clutch fails to lock, the transmission will act as if it is slipping and not transmitting engine torque correctly to the drive wheels. They can transmit torques in one direction and are radially compact. One-way clutches can be either one-way rollers or sprags. Figure 4: 4R100 Coast Clutch Drum. Above left: This is how a bolt-in sprag should look, with prongs to hold the rollers and springs. Explain the functions of the torque converter. The sprag has proven to be one of the stronger points of the compounder assembly. 0 /5 ·. The first one-way clutch was designed in 1869 for use in a bicycle. 1-2 shift - Intermediate clutches apply, intermediate sprag stops direct drum holding sun gear. 3 Structure of KX Series One-way Clutch 2 End bearing Cage Spring Overrunning Input InputAlways grease lubricated. Study with Quizlet and memorize flashcards containing terms like Technician A says a simple check valve is used to block a hydraulic passageway. Torque: 70 Nm - 2,300 Nm. The wedge-raceway contact mechanical model, considering centrifugal force of wedge and the eccentricity of the inner ring and the outer ring of the one-way clutch, is established based on Hertz contact theory. The paper explained both the static and dynamic behavior of roller One-Way Clutches (OWC), and described the practical application of esoteric stress equations to the design of roller OWCs. It resembles a roller bearing but, instead of cylindrical rollers, non-revolving asymmetric figure-eight shaped sprags are used. sprag bearing overrunning clutch. The sprag (roller clutch) on the left illustrates greater capacity via an increased number of rollers and greater width. Product Description. About us. tech A b. The ramped roller style is shown on the right side (like the Xiongda). 6). Suitable for low to mid-speed and middle load applications. 1001. The ramped roller style is shown on the right side (like the Xiongda). PP are sprag type freewheels integrated into 62. Freewheel bearings are characterised by their ability to only turn in one direction which. P and CSK. Sprag Clutch Springs Guide. Remove the sprag.