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Product Specifications:
| Item | Jaw Coupling Hub |
| Bore Dia. | 0.312" |
| Bore Diameter | 5/16" |
| Bore Tolerance | 0" to 0.002" |
| Bore Type | Round Bore |
| Coupling Overall Length | 1 3/4" |
| Coupling Size | Js21 |
| Fail Safe | Yes |
| For Shaft Type | Round |
| Full Bearing Support Required | Yes |
| Hub Diameter | 1 5/16" |
| Hub Material | Aluminum |
| Hub Material Finish | Bright |
| Hub Material Grade | Grade 2024 |
| Hub Projection | 19/32" |
| Included Screws | (2) Set Screw |
| Jaw Profile | Curved |
| Keyway | No |
| Keyway Size | None |
| Length Through Bore | 3/5" |
| Maximum Operating Temperature | 180°F |
| Maximum Speed | 8000 RPM |
| Minimum Operating Temperature | -10°F |
| Number Of Locking Screws | 2 |
| Outside Dia. | 0.312" |
| Outside Diameter | 1 5/16" |
| Overall Length | 15 mm |
| Screw Material | Alloy Steel |
| Screw Material Finish | Black Oxide |
| Screw Thread Size | M4 |
| Shaft Locking Type | Set Screw |
| Shaft Tolerance | -0.0005" to 0" |
| Size | JS21 |
| System Of Measurement | Imperial |
| Zero Backlash | Yes |
Shipping Info:
| Ship weight (kg) | 0.04 |
| Ship height (cm) | 3.56 |
| Ship length (cm) | 4.45 |
| Ship width (cm) | 10.16 |
| HS code | 8483608000 |
| Country of Origin | US |
Product Variants
| Model | Coupling Size | Outside Dia. | Bore Dia. | Length Through Bore | Size | Hub Projection | Included Screws | Number Of Locking Screws | Price | |
|---|---|---|---|---|---|---|---|---|---|---|
| JS10-2-A | JS10 | 0.594" | - | 0.3" | JS10 | 19/64" | Set Screw | 1 | €36.59 | |
| JS10-3-A | JS10 | 0.594" | - | 0.3" | JS10 | 19/64" | Set Screw | 1 | €36.59 | |
| JS10-4-A | JS10 | 0.594" | 1/4" | 0.3" | JS10 | 19/64" | Set Screw | 1 | €36.59 | |
| JS12-3-A | Js12 | 3/4" | - | 2/5" | JS12 | 25/64" | Set Screw | 1 | €41.02 | |
| JS12-4-A | Js12 | 3/4" | 1/4" | 2/5" | JS12 | 25/64" | Set Screw | 1 | €40.69 | |
| JS12-5-A | Js12 | 3/4" | 0.312" | 2/5" | JS12 | 25/64" | Set Screw | 1 | €41.02 | |
| JS16-4-A | JS16 | 1" | 1/4" | 1/2" | JS16 | 15/32" | (2) Set Screw | 2 | €51.87 |
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RULAND MANUFACTURING JS21-5-A Jaw Coupling Hub 5/16 Inch Aluminium
€74.87 /unit
