• KOYO Miniature One-Way Clutches (1WC, EWC Series)
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KOYO Miniature One-Way Clutches (1WC, EWC Series)

KOYO Miniature One-Way Clutches (1WC, EWC Series)

Miniature one-way clutches consisting of a drawn cup with rollers and springs: 1WC series with metal springs and EWC series with resin springs, shaft diameter 4 to 12 mm.

Key features

  • Transmit torque in one direction, freewheel in the other
  • 1WC series: metal springs
  • EWC series: resin springs
  • Drawn cup for press fitting into housing
  • Suitable for polyacetal resin housings

Specifications

Product type One-way clutch (drawn cup)
Series 1WC, EWC
Shaft range 4 - 12 mm
Source KOYO Ball & Roller Bearings catalogue (Bearing specification tables), p. B460-B461
EWC0406A Shaft d: 4 mm | D2: 8.4 mm | B: 6 mm | Torque capacity: 0.08 N.m | Mass: 1.0 g
EWC0406C Shaft d: 4 mm | D2: 8.4 mm | B: 6 mm | Torque capacity: 0.15 N.m | Mass: 1.0 g
EWC0608A Shaft d: 6 mm | D2: 10.4 mm | B: 8 mm | Torque capacity: 0.25 N.m | Mass: 1.7 g
EWC0608C Shaft d: 6 mm | D2: 10.4 mm | B: 8 mm | Torque capacity: 0.44 N.m | Mass: 1.7 g
1WC0608 Shaft d: 6 mm | D2: 10.4 mm | B: 8 mm | Torque capacity: 0.44 N.m | Mass: 2.0 g
1WC0612 Shaft d: 6 mm | D2: 10.4 mm | B: 12 mm | Torque capacity: 0.88 N.m | Mass: 3.0 g
EWC0809A Shaft d: 8 mm | D2: 12.4 mm | B: 9 mm | Torque capacity: 0.49 N.m | Mass: 2.4 g
EWC0809C Shaft d: 8 mm | D2: 12.4 mm | B: 9 mm | Torque capacity: 0.88 N.m | Mass: 2.4 g
EWC0812A Shaft d: 8 mm | D2: 15 mm | B: 12 mm | Torque capacity: 1.18 N.m | Mass: 5.8 g
EWC0812C Shaft d: 8 mm | D2: 15 mm | B: 12 mm | Torque capacity: 1.96 N.m | Mass: 5.8 g
1WC0812 Shaft d: 8 mm | D2: 15 mm | B: 12 mm | Torque capacity: 1.96 N.m | Mass: 7.0 g
1WC0815 Shaft d: 8 mm | D2: 15 mm | Torque capacity: 2.65 N.m | Mass: 8.0 g
EWC1010A Shaft d: 10 mm | D2: 17 mm | B: 10 mm | Torque capacity: 1.18 N.m | Mass: 6.0 g
EWC1010C Shaft d: 10 mm | D2: 17 mm | B: 10 mm | Torque capacity: 1.96 N.m | Mass: 6.0 g
EWC1012A Shaft d: 10 mm | D2: 17 mm | B: 12 mm | Torque capacity: 1.37 N.m | Mass: 6.8 g
EWC1012C Shaft d: 10 mm | D2: 17 mm | B: 12 mm | Torque capacity: 2.35 N.m | Mass: 6.8 g
1WC1012 Shaft d: 10 mm | D2: 17 mm | B: 12 mm | Torque capacity: 2.35 N.m | Mass: 8.0 g
1WC1216 Shaft d: 12 mm | D2: 19 mm | B: 16 mm | Torque capacity: 6.28 N.m | Mass: 12 g
Needle Roller BearingsKOYO
18 product codes available in this family
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KOYO Miniature One-Way Clutches (1WC, EWC Series)

Brand KOYO·Needle Roller Bearings

Available part numbers (18)

EWC0406A, EWC0406C, EWC0608A, EWC0608C, 1WC0608, 1WC0612, EWC0809A, EWC0809C, EWC0812A, EWC0812C + 8 more — see full table ↓

How to order

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Product codes & specifications
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Product codeSpec
EWC0406AShaft d: 4 mm | D2: 8.4 mm | B: 6 mm | Torque capacity: 0.08 N.m | Mass: 1.0 g
EWC0406CShaft d: 4 mm | D2: 8.4 mm | B: 6 mm | Torque capacity: 0.15 N.m | Mass: 1.0 g
EWC0608AShaft d: 6 mm | D2: 10.4 mm | B: 8 mm | Torque capacity: 0.25 N.m | Mass: 1.7 g
EWC0608CShaft d: 6 mm | D2: 10.4 mm | B: 8 mm | Torque capacity: 0.44 N.m | Mass: 1.7 g
1WC0608Shaft d: 6 mm | D2: 10.4 mm | B: 8 mm | Torque capacity: 0.44 N.m | Mass: 2.0 g
1WC0612Shaft d: 6 mm | D2: 10.4 mm | B: 12 mm | Torque capacity: 0.88 N.m | Mass: 3.0 g
EWC0809AShaft d: 8 mm | D2: 12.4 mm | B: 9 mm | Torque capacity: 0.49 N.m | Mass: 2.4 g
EWC0809CShaft d: 8 mm | D2: 12.4 mm | B: 9 mm | Torque capacity: 0.88 N.m | Mass: 2.4 g
EWC0812AShaft d: 8 mm | D2: 15 mm | B: 12 mm | Torque capacity: 1.18 N.m | Mass: 5.8 g
EWC0812CShaft d: 8 mm | D2: 15 mm | B: 12 mm | Torque capacity: 1.96 N.m | Mass: 5.8 g
1WC0812Shaft d: 8 mm | D2: 15 mm | B: 12 mm | Torque capacity: 1.96 N.m | Mass: 7.0 g
1WC0815Shaft d: 8 mm | D2: 15 mm | Torque capacity: 2.65 N.m | Mass: 8.0 g
EWC1010AShaft d: 10 mm | D2: 17 mm | B: 10 mm | Torque capacity: 1.18 N.m | Mass: 6.0 g
EWC1010CShaft d: 10 mm | D2: 17 mm | B: 10 mm | Torque capacity: 1.96 N.m | Mass: 6.0 g
EWC1012AShaft d: 10 mm | D2: 17 mm | B: 12 mm | Torque capacity: 1.37 N.m | Mass: 6.8 g
EWC1012CShaft d: 10 mm | D2: 17 mm | B: 12 mm | Torque capacity: 2.35 N.m | Mass: 6.8 g
1WC1012Shaft d: 10 mm | D2: 17 mm | B: 12 mm | Torque capacity: 2.35 N.m | Mass: 8.0 g
1WC1216Shaft d: 12 mm | D2: 19 mm | B: 16 mm | Torque capacity: 6.28 N.m | Mass: 12 g

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