China OEM One Way Sprag Overrunning Clutch Needle Roller Bearings DC7221b 15c 5c for Corn Harvester with Hot selling

Product Description

One Way Sprag Overrunning Clutch Needle Roller Bearings DC7221B 15C 5C for Corn Harvester

Bearing Description

One Way Sprag Overrunning Clutch Bearing Introduction

One way sprag overrunning clutch bearing rotates in only 1 direction to provide backstop functionality for applications requiring stoppage of rotation without roll-back, as there are keyways either on the inner ring, outer ring or both. The rolling elements of 1 way bearing can be balls or rollers. All rolling bearings are open, shielded, or sealed.

There are common HF,HFL,FC,FCB,RCB,RC,F,IWC,EWC,DC,CSK,CKB(B200),ASNU,CKA,FWD,NF series 1 way bearings used currently according to different situations.

DC series 1 way overruning clutch bearing a sprag type caged bearing without inner or outer races. It must be installed in a designed providing races, bearing support for axial and radial loads, lubrication and sealing. The DC type version-N accepts all types of lubricants currently used in the power transmission equipment. The sprag space tolerance must not be exceeded. Inner and outer races must both have a minimum plain width “e*”, without any recess, to ensure the drive pulley or freewheel functions correctly. Surface hardness of the finished part should be HRC 60 to 62, for a depth of 0,6 mm minimum. Core hardness to be HRC35 to 45. Surface roughness not to exceed 22CLA. Maximum taper between races: 0,007 mm for 25 mm width.

Bearing Specification

DC Series Sprag Clutch One Way Bearing Designation

Bearing Designation Torque Inner Ring Speed Outer Ring Speed Boundary Dimension Number of Clips Number of Sprags  Mass
d D C D1 d1
(Nm) n(min-1) (mm) (kg)
DC2222G-N 63  8600  4300  22.225 38.885 10 50 15  12  0.03
DC2776-N 119  6900  3400  27.762 44.422 13.5 58  18  14  0.055
DC3034-N 124  6300  3100  30.34 47 13.5 62  20  14  0.06
DC3175(3C)-N 159  6000  3000  31.75 48.41 13.5 63  21  16  0.06
DC3809A-N 275  5000  2500  38.092 54.752 16 71  25  18  0.085
DC4127(3C)-N 224  4600  2300  41.275 57.935 13.5 75  27  18  0.09
DC4445A-N 363  4300  2100  44.45 61.11 16 79  29  20  0.095
DC4972(4C)-N 306  3800  1900  49.721 66.381 13.5 86  33  22  0.1
DC5476A-N 525  3500  1700  54.765 71.425 16 92  36  24  0.11
DC5476A(4C)-N 525  3500  1700  54.765 71.425 16 92  36  24  0.13
DC5476B(4C)-N 769  3500  1700  54.765 71.425 21 92  36  24  0.18
DC5476C(4C)-N 990  3500  1700  54.765 71.425 25.4 92  36  24  0.2
DC5776A-N 604  3300  1600  57.76 74.42 16 98  38  26  0.11
DC6334B-N 806  3000  1500  63.34 80 21 104  42  26  0.175
DC7221(5C)-N 675  2600  1300  72.217 88.877 13.5 115  48  30  0.14
DC7221B-N 1279  2600  1300  72.217 88.877 21 115  48  30  0.185
DC7221B(5C)-N 1279  2600  1300  72.217 88.877 21 115  48  30  0.21
DC7969C(5C)-N 2038  2400  1200  79.698 96.358 25.4 124  53  34  0.28
DC8334C-N 2055  2300  1100  83.34 100.000  25.4 132  55  34  0.27
DC8729A-N 1250  2200  1100  87.29 103.96 16 134  58  34  0.165
DC10323A(5C)*-N 1612  1800  900  103.231** 119.891 16 155  68  40  0.205
DC12334C*-N 4800  1500  750  123.340** 140.000  25.4 184  80  50  0.4
DC12388C(11C) 4875  1500  750  123.881 142.88 25.4 186  80  11  44  0.4

€Please contact us for more models information

Bearing Detailed Pictures

Guomai Sprag One Way Clutch Bearing DC7221B(15C)

About ZheJiang CZPT Bearing

About CZPT Bearing Factory

ZheJiang CZPT Bearing Co.,Ltd(hereinafter referred to as Guomai) was established in 1999, with more than 20 years of bearing research and manufacturing experience. The factory covers an area of 16000 square meters,7000 of which is manufacturing area and the other is office and warehouse. CZPT has large stock for normally used bearing models and this enables us to deliver the bearing to customers within the shortest time.

There are total 160 staffs, 6 automatic bearing assembly lines,116 CNC machines and 22 sets of precise inspection instruments. We not only have our own R&D team but also cooperate with ZheJiang University of Science and Technology, HangZhou Bearing Research Institute to develop new bearing designing and manufacturing technology.
In addition to conventional bearings, CZPT also provides OEM and ODM service to our respectable customers to meet their individual requirements.We introduced advanced milling, turning machines, heat treatment equipment and bearing testing machines to guarantee the quality of the bearings because we know “Quality is the life of Guomai” .Now our top products include taper roller bearing, angular contact ball bearing, deep groove bearing ,spherical bearing and cylindrical roller bearing with P5, P4 accuracy grade.

After so many years of developing, CZPT has built up an excellent sales network within China. Our 2 bearing brands “CVZ” and “Bentu” are well known and have high reputation within the industrial equipment and components field. Moreover, with confidence of our bearing quality, we started to export our bearings 4 years ago. Customers from Europe, North America, Middle East, Southeast Asia and Africa have enjoyed the happiness our bearings brought to them.

Guomai Bearing always upholds “WIN-WIN” spirit and believes in “Details determine success” philosophy, and keep improving bearing quality in the past 20 years.  Some series of our bearings have similar quality with SKF, NSK, Timken, NACHI, KOYO, CZPT and other world famous brands but with lower price.
Looking to the future, CZPT will insist on the technology innovation and processing levels to provide the most appropriate bearing products and service to our customers.

Bearing web page description and models may be limited, please contact us for more information.

Guomai Featured Bearings

Guomai’s Other Featured Bearings


Reasons to Choose Us ?

Reasons to choose CZPT Bearings as your sprag clutch freewheel 1 way bearings partner 

1. Bearing designing: Guomai has our own bearing R&D team and adopts Germany technology. This enables us to provide OEM and ODM service to you.
2. Production process:We strictly follow the 5S production process and acquired ISO9001:2008 quality management system certificate. Besides, we introduced from abroad world famous brands lathes and heat treatment equipment, this enables us to provide high precision bearings with similar quality to world famous brands such as SKF,TIMKEN,NSK,NTN,KOYO,NACHI and so on.
3. Materials: To ensure the high quality of bearings, we use high carbon chrome bearing steel which provides high rigidity, and high resistance to CZPT wear to produce the bearings. Low carbon cold rolled steel and low carbon stainless steel is also used according to customers’ requirements.
4. Quality inspection: All bearings will be strictly tested before packing. We have CZPT talysurf, hardness meter,clearance detector,vibration(speed) measuring instrument,roundness instrument to guarantee all bearings are qualified with the standards.
5. Lubricants: Suitable lubricants are used to protect the bearings from oxidation or corrosion of parts thus enable our bearings with longer lifetime, low noise and better high temperature performance. Selection of lubricants is generally governed by the bearing application. Right choice of high quality lubricants could prevent metal to metal contact and conduct heat away from the bearings.
6. Packing: Guomai bearings pay attention to every detail in the bearing production process. We adopt plastic bag, Kraft paper, thick paper box and cartons to protect the bearings from unexpectable damage during the transportation and warehouse stock.
7. Factory direct marketing: We are the factory and not the distributor or trading agent, so we could provide the same quality with competitive price.

International Trade Show

Fair Show Abroad

Packaging & Shipping

Guomai Bearings, Roll Together with the World and You!!!
76CT4847F2 68CA4864F2 84NZ4821 81NZ5521 86NT5760F2 86NT5760F2-1 86NT5760F0 NZ5721 NT5549F2 NT5742F2 86TKB5780 81TKB7013 85CT5765F2 996714-TX 996713KA2-TX 996714BB/72 996714BB/80 996714 996914/104 9969/110 85CT5787F2 360111/4855 CT4445F0 70CL5781F0 70CL5791F0 70CL6081F0 70CL6082F0 70CL5782F0 86CL6089F0/A 86CL6082F0 KZIZ-5100 86CL6092F0 86CL6395F0 1332 86CL6395F0/A 86CL6089F0 198905 98206 198906K 198907 198908 198909K 45716K 329908K 429908 329909 329909A 329909K 129908 229909 98907 329210 329910 329910A 329909A 329910 517/38 517/42 517/52 517/47 917/45 51708 45715K 45717K 815/52ZS/YA 81708ZSV/YA 815/32ZS/YA 81707ZSV/YA

Pulley Type

There are several types of pulleys. These include fixed pulleys, load multipliers and movable pulleys. Below is a description of each pulley type. A load multiplier is a special type of pulley with multiple wheels for increased lifting capacity. It is used in a wide range of applications including power transmission and construction. Some common uses of pulleys are listed below.

moving pulley

Movable pulleys work by transferring the weight of a load to another object of the same mass. Since a live pulley is inherently frictionless and weightless, the force required to lift a load with it is the same as the weight of the load. This principle applies to tall buildings and residences. It is an excellent choice for lifting heavy objects such as furniture and washing machines.
A pulley is a mechanical device with a wheel that rotates on a shaft. The axle is attached to the wheel and is usually fixed. The movable pulley can be fixed or movable, both of which can change the direction of the force on the rope. Some pulleys can also change the magnitude and direction of the force. They are ideal for a variety of applications, from lifting heavy objects to transporting objects.
Another type of movable pulley works by transmitting force to another object. It has a free axis and the total force provided by the rope tension is balanced. Since the tension on the rope is constant in each segment, pulling 1 end of the rope will double the force on the shaft, resulting in 2 mechanical advantages. This mechanical advantage is the main reason why movable pulleys are so versatile.
Another form of moving pulley is called a KWL diagram. The KWL diagram summarizes the basic concepts of the drive wheel. KWL diagrams are an excellent way to assess a student’s understanding of the concepts discussed in the course. Word questions are a great way to check whether students understand concepts. When students answer the word questions correctly, the answer is yes!

Fixed wheel pulley

If you need to move heavy objects, a single fixed wheel pulley is not a good choice. Using a single fixed pulley might be similar to using a handbag, but it’s not very convenient. This type of pulley system relies on friction to transmit motion. As a result, it can slip and isn’t always reliable. Fortunately, you can find other options that work just as well.
Fixed pulleys are the most basic type of pulley. They consist of grooved wheels and ropes attached to objects. These pulleys make lifting easier. Because the rope or cable only moves in 1 direction, the movement of the object feels lighter. And they are also easy to install. However, before you buy a fixed wheel pulley, make sure it is strong enough to support the weight of the load.
The disadvantages of fixed pulleys are obvious. One of them is the lack of mechanical advantage. A fixed pulley pulls up with the same force as a single moving pulley, and a single fixed pulley is not particularly effective as a force multiplier. However, the effect is more pronounced when you combine multiple fixed-wheel pulleys. You will get double the power! So what do fixed wheel pulleys have to offer?
Fixed wheel pulleys can be as small as a ring. A single ring pulley requires twice as much force as the weight being pulled. Adding more loops to the rope will reduce the effort required to pull the weight. The mechanical advantage of a fixed pulley is proportional to the number of strands running to the free pulley. A 100-pound pull on the free end will lift a 300-pound load.

composite pulley

Compound pulleys are pulleys that can be used to change the direction of a control wire. It can also be used to modify the mechanical force of the wire by moving the item it is connected to. In galleons, compound pulleys are more common. They are often combined with other ropes for mechanical advantage. Here are some common uses for composite pulleys.
The ideal mechanical advantage of a pulley is equal to the number of rope segments that pull up the load. This means that the more rope segments, the less force is required. A compound pulley will have the ideal mechanical advantage of 2, which means it will generate more force than a simple pulley. Composite pulleys are also more efficient at transmitting force because their number of rope segments is usually equal to the unit weight.
Composite pulley systems use more than 2 pulleys and ropes. More pulleys will reduce the force required to move heavier objects. They are usually used in large sailboats. The system is also used on construction sites. It can be used for a variety of applications, including lifting large objects or transmitting electricity. You can imagine how it would change your life if you had to move a large sailboat, but the result would be the same: a composite pulley system would make it easier to lift a large sailboat.
Composite pulleys are also known as fixed pulleys. The fixed pulley is stationary, and the movable pulley moves back and forth. The latter is more effective when used with a detachable cord or strap. On the other hand, a moving pulley is a moving pulley and it gives you a mechanical advantage. You can imagine this pulley on a flagpole.

load multiplier

The multiplication system has 3 basic parts: the rope grab, the connector, and the pulley. While some basic multipliers may combine the 3 parts, the concept remains the same. The multiplication system can make pulling the rope easier by reducing the amount of friction that occurs. Below are some examples of multiplication systems. A compact rope grab is a great option for resetting the multiplier.
The load reduction that a pulley system can achieve is proportional to the number of ropes used to support it. Although most utility pulley systems use only 4 ropes, the theoretical maximum load reduction is a quarter of the actual load. In other words, the four-wheel system only reduces the weight of a 1,000-pound load by a quarter. That would require 167 pounds of force, a far cry from the 500-pound load a single pulley system can achieve.
The mechanical advantage of a pulley system can be calculated by calculating the ratio between the forces exerted on each wire. For example, a 90-kilogram load is supported by 3 ropes, each weighing about 30-5 pounds. The ropes on pulleys A and B each carry a load of 60 kg. Using this formula, a single pulley system will yield a mechanical advantage over 2 tractors.
To calculate the force required to pull the rope over the pulley, measure the angle and deflection between the ropes. The deflection angle when added to the included angle should equal 180 degrees. A 75 degree angle requires 159% of the load force. This means a total load multiplier of four. This formula is an important tool for calculating the force multiple of the pulley.

Disadvantages of fixed pulleys

There are 2 basic types of pulleys: movable and fixed. Active pulleys are more advanced, allowing the pulley to move according to the load. They reduce the force required to lift the load. Active roller pulleys are more compact and therefore take up less space. Both types are good for lifting heavier objects, but they each have their pros and cons.
Fixed wheel pulleys can be used to lift heavy objects. This type of pulley consists of a wheel with a fixed shaft that has grooves on its edges for guiding ropes or cables. This is a simple machine as no motor or engine is required to lift objects. When 2 or more wheels are used together, the ropes around the wheels form a powerful hoist.
Single wheel pulleys are not suitable for lifting. They tend to push things down. Also, they are unreliable because they rely on friction and can slip. Also, a single wheel pulley would require a lot of space. Another disadvantage of fixed-wheel pulleys is that they make it difficult to move heavy objects easily. Single fixed-wheel pulleys also tend to slip easily, making them a poor choice for many applications.
Fixed wheel pulleys are also easier to install and maintain than manually operated ones. It requires less space and lubrication than manual pulleys. Manual pulleys can cause injury because the operator will be lifting the full weight of the heavy object. Additionally, rope slippage can lead to muscle strains and rope burns. And the system requires frequent maintenance.

China OEM One Way Sprag Overrunning Clutch Needle Roller Bearings DC7221b 15c 5c for Corn Harvester     with Hot sellingChina OEM One Way Sprag Overrunning Clutch Needle Roller Bearings DC7221b 15c 5c for Corn Harvester     with Hot selling