Changzhou Tianniu Transmission Equipment Co., Ltd
| Type | DC Series |
| Precision Rating | P6 |
| Seals Type | non-sealed |
| Height | 21 mm |
| Drag Torque | 1023 N.m |
| Race Material | GCr15 |
| Inner Diameter | 72.217 mm |
| Outer Diameter | 88.877 mm |
| Sprag Space | 8.33 mm |
| Plain Width | 21 mm |
| Bore Diameter | 115 mm |
| Width | 56 mm |
| Surface Hardness | HRC 60-62 |
| Core Hardness | HRC 35-45 |
| Surface Roughness | 22CLA max |
| Brand Name | SUMA or OEM |
| Model Number | DC7221B |
| Place of Origin | Jiangsu, China |
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Product Specification
| Type | DC Series | Precision Rating | P6 |
| Seals Type | non-sealed | Height | 21 mm |
| Drag Torque | 1023 N.m | Race Material | GCr15 |
| Inner Diameter | 72.217 mm | Outer Diameter | 88.877 mm |
| Sprag Space | 8.33 mm | Plain Width | 21 mm |
| Bore Diameter | 115 mm | Width | 56 mm |
| Surface Hardness | HRC 60-62 | Core Hardness | HRC 35-45 |
| Surface Roughness | 22CLA max | Brand Name | SUMA or OEM |
| Model Number | DC7221B | Place of Origin | Jiangsu, China |
| High Light | DC 7221B one way bearing ，sprag type freewheel bearing ，one way clutch bearing with warranty | ||
DC 7221B Sprag Type Freewheel Cage One Way Bearing
Feature
Type DC is a sprag type freewheel cage without inner or outer races. It must be installed in a design 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 transmis-sion equipement.
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 freewheel functions correctly as shown on following pages.
Alternatively, races can be made in case hardened steel shafts, or housings, to the specification below. 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.
| Type | Drag torque | Size(mm) | Number of clips | |||||
| Tkn(NM) | a | c | sprag space | e | d | b | ||
| DC2222G | 50 | 22.225 | 38.885 | 8.33 | 10 | 50 | 17 |
|
| DC2776 | 95 | 27.762 | 44.422 | 8.33 | 13.5 | 58 | 21 |
|
| DC3034 | 99 | 30.34 | 47 | 8.33 | 13.5 | 62 | 23 |
|
| DC3175(3C) | 127 | 31.75 | 48.41 | 8.33 | 13.5 | 63 | 24 | 3 |
| DC3809A | 220 | 38.092 | 54.752 | 8.33 | 16 | 71 | 29 |
|
| DC4127(3C) | 179 | 41.275 | 57.935 | 8.33 | 13.5 | 75 | 32 | 3 |
| DC4445A | 290 | 44.45 | 61.11 | 8.33 | 16 | 79 | 34 |
|
| DC4972(4C) | 245 | 49.721 | 66.381 | 8.33 | 13.5 | 86 | 38 | 4 |
| DC5476A | 420 | 54.765 | 71.425 | 8.33 | 16 | 92 | 42 |
|
| DC5476A(4C) | 420 | 54.765 | 71.425 | 8.33 | 16 | 92 | 42 | 4 |
| DC5476B(4C) | 615 | 54.765 | 71.425 | 8.33 | 21 | 92 | 42 | 4 |
| DC5476C(4C) | 792 | 54.765 | 71.425 | 8.33 | 25.4 | 92 | 42 | 4 |
| DC5776A | 483 | 57.76 | 74.42 | 8.33 | 16 | 98 | 44 |
|
| DC6334B | 645 | 63.34 | 80 | 8.33 | 21 | 104 | 50 |
|
| DC7221(5C) | 540 | 72.217 | 88.877 | 8.33 | 13.5 | 115 | 56 | 5 |
| DC7221B | 1023 | 72.217 | 88.877 | 8.33 | 21 | 115 | 56 |
|
| DC7221B(5C) | 1023 | 72.217 | 88.877 | 8.33 | 21 | 115 | 56 | 5 |
| DC7969C(5C) | 1630 | 79.698 | 96.358 | 8.33 | 25.4 | 124 | 61 | 5 |
| DC8334C | 1645 | 83.34 | 100 | 8.33 | 25.4 | 132 | 65 |
|
| DC8729A | 1000 | 87.29 | 103.96 | 8.33 | 16 | 134 | 67 |
|
| DC10323A(3C) * | 1290 | 103.231 ** | 119.891 | 8.33 | 16 | 155 | 80 | 3 |
| DC12334C * | 3840 | 123.34 ** | 140 | 8.33 | 25.4 | 184 | 96 |
|
| DC12388C(11C) | 3900 | 123.881 | 142.88 | 9.5 | 25.4 | 196 | 96 | 11 |
Changzhou Suma Precision Machinery Co., Ltd(Changzhou Tianniu Clutch Factory)is a manufacturer specialized in Producing Various cam clutch, one way bearing, one way clutch, backstop clutch, overrunning clutch and other bearings with high technology.
We are following "Best Quality, Best Price, Fast Delivery, Best Serves" to make all of our old and new customers satisfied.
Our Advantages
1. Advanced producing equipment.
2. Strict requirement for the raw material
3. Complete&perfect process flow
4. Good quality of each batch of the product
5. Different grades of price for different quality
Pre-sale service:
We will delivery the goods in 10 days after your order is confirmed.
After sale service:
Our factory provide technical assistance to support every doubt during usage and maintenance.
Q: Why do we choose your company?
A: We always insist quality first. We have our bearing factory, therefore we have advantage in quality control and price of one way clutch bearing.
Q:What is the delivery time?
A: Most of the bearing we have stock. For small quantity, we will arrange delivery within 15 days.
Q: What is your payment term?
A: Our payment term include L/C, T/T, Western Union, Paypal etc.
Q: Can you send bearing samples first?
A: Yes, we can send bearing samples of one way clutch bearing to check quality first.
If you have any needs,pls contact me at any time!
Company Details
Business Type:
Manufacturer,Exporter,Trading Company,Seller,Other
Year Established:
2007
Total Annual:
8,000,000-10,000,000
Employee Number:
50~100
Ecer Certification：
Verified Supplier
Changzhou Tianniu Transmission Equipment Co., Ltd is a professional one way clutch bearing supplier, the primary products are micro electromagnetic clutch, torque limiter coupling, sliding shaft coupling, flexible propeller shaft coupling, locking assembly and shaft couplings, etc.... Changzhou Tianniu Transmission Equipment Co., Ltd is a professional one way clutch bearing supplier, the primary products are micro electromagnetic clutch, torque limiter coupling, sliding shaft coupling, flexible propeller shaft coupling, locking assembly and shaft couplings, etc....
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