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Cage assemblies and needle rollers supplier. Changzhou Tianniu Clutch Factory is a manufacturer specialized in Producing Various cam clutch, one way bearing, one way clutch, backstop clutch, overrunning clutch and needle roller bearing with high technology.
Common Applications for DC Sprag Freewheel Cages
Our DC series are engineered for reliability in high-speed overrunning, backstopping, and indexing applications across various industries. Common uses include:
Conveyor Backstop: Prevents reverse rotation on inclined belt conveyors and bucket elevators.
Gearbox Overrunning Clutch: Enables freewheeling in industrial gearboxes and speed reducers.
Packaging Machinery: Accurate indexing and positioning in high-speed packing lines.
Mining Equipment: Backstop function on bucket elevators and vertical conveyors.
Agricultural Machinery & Motorcycle Starters: Compact one-way drive for starting systems.
Data Sheet
| Item | DC |
| Material | GCr15 |
| Bore size | 22.225-123.881 mm |
| Outer dia. | 38.885-142.880 mm |
| Nominal torque | 63-4785 Nm |
| Weight | 0.03-0.4 kg |
| Sprags quantity | 12-44 |
| Overrunning speed (outer race) | 750-4300 min-1 |
| Overrunning speed (inner race) | 1500-8600 min-1 |
| Package | carton box |
Feature
1.Type DC is a one way sprag clutch bearing without inner or outer races. It must be installed in a design providing races, bearing support for axial and radial loads, lubrication and sealing.
2.The DC type version-N accepts all types of lubricants currently used in the power transmission equipement.
3.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 .
4.Alternatively, races can be made in case hardened steel shafts, or housings,
Surface hardness of the finished part should be HRC 60 to 62, for a depth of 0,6 mm minimum.
5.Core hardness to be HRC35 to 45. Surface roughness not to exceed 22CLA. Maximum taper between races:0,007 mm for 25 mm width.
Size | Overrunning speeds | Sprag space | No. of clips | Number of sprags | Weight | ||||||
nimax2) | namax3) | Øa+0.008 | Øc± 0.013 | emin | Ødmin | Øbmax | |||||
[min -1] | [min -1] | [mm] | [mm] | [mm] | [mm] | [mm] | [mm] | [kg] | |||
DC2222G-N | 8600 | 4300 | 22.225 | 38.885 | 8.33±0.075 | 10 | 50 | 15 | – | 12 | 0.03 |
DC2776-N | 6900 | 3400 | 27.762 | 44.422 | 8.33±0.075 | 13.5 | 58 | 18 | – | 14 | 0.055 |
DC3034-N | 6300 | 3100 | 30.34 | 47 | 8.33±0.075 | 13.5 | 62 | 20 | – | 14 | 0.06 |
DC3175(3C)-N | 6000 | 3000 | 31.75 | 48.41 | 8.33±0.075 | 13.5 | 63 | 21 | 3 | 16 | 0.06 |
DC3809A-N | 5000 | 2500 | 38.092 | 54.752 | 8.33±0.075 | 16 | 71 | 25 | – | 18 | 0.085 |
DC4127(3C)-N | 4600 | 2300 | 41.275 | 57.935 | 8.33±0.075 | 13.5 | 75 | 27 | 3 | 18 | 0.09 |
DC4445A-N | 4300 | 2100 | 44.45 | 61.11 | 8.33±0.1 | 16 | 79 | 29 | – | 20 | 0.095 |
DC4972(4C)-N | 3800 | 1900 | 49.721 | 66.381 | 8.33±0.1 | 13.5 | 86 | 33 | 4 | 22 | 0.1 |
DC5476A-N | < | ||||||||||
A: The DC-N version is designed to accept all types of lubricants currently used in power transmission equipment, providing greater flexibility in various operating conditions. Both share the same dimensional specifications.
A: Yes, the DC series is widely used as a backstop one-way clutch for inclined conveyors and bucket elevators. Ensure the overrunning speed (outer race) does not exceed the limit listed in the data sheet for backstopping applications.
A: Yes, Suma (Changzhou Tianniu Clutch Factory) provides customization. Please contact us with your required bore size, outer diameter, and torque requirements, and we will provide a tailored solution.
A: Yes, proper lubrication is essential. Oil bath or forced oil lubrication is recommended for high-speed overrunning (inner race > 3000 min⁻¹). For lower speeds, grease with the correct consistency may be used.
A: Standard sizes are typically available within 15-20 working days. Custom sizes or heat treatment requirements may take 25-30 days. Please confirm your schedule with our sales team.
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E-mail: lena@chinasuma.com
Mobile: 0086-13306120917
Tel: 0086-519-85858018
Fax: 0086-519 85858018
WhatsApp: +86-13306120917
Add: Liudao Industrial Park, YaoguanTown, Wujin District , Changzhou City , Jiangsu Province, China , 213102
