# 12SCH278 12SC-HX2 7/8 SF HUB

**Manufacturer:** TB Woods  
**MPN:** `12SCH278`

## Specifications

| Attribute | Value |
| --- | --- |
| Brand name | TB Woods |
| Manufacturer name | TB Woods |
| Manufacturer | TB Woods |
| CategoryL1 | Shaft Couplings and Collars |
| CategoryL2 | Elastomeric Sleeve Couplings |
| CategoryL3 | Components |
| CategoryL4 | Hubs |
| Extra Product Name | 12SCH278 12SC-HX2 7/8 SF HUB |
| moq | 1 |
| MPN | 12SCH278 |
| multiple | 1 |
| qtyInStock | 0 |
| SKU | 338489 |
| snippet | 12SCH278 12SC-HX2 7/8 SF HUB |
| tierMinQty1 | 1 |
| tierPrice1 | 262.97 |
| Bore size | 2 7/8 in |
| Material type | High strength cast iron |
| Capscrew torque requirement | 18 |
| Setscrew size, location | 5/8 11 UNC, over keyseat |
| Setscrew length (in) | 1 |
| Max speed | 2800 |
| Setscrew length | 1 |
| Max angular gap misalignment | 0.175 (in) with EPDM/Neoprene Sleeves and 0.042 (in) with Hytrel Sleeves |
| Capscrew size (in) | Qty 4 -- 5/8 x 4 |
| Dimension (in) (H) | 5 3/4 |
| Dimension (in) (S) | 1-5/8 |
| Setscrew Torque Requirment (ft lbs) | 165 |
| Horsepower Rating at 100 RPM | 66 |
| Min compatible bore size | 0.875 |
| Power rating at 100 RPM | 11 kW with EPDM or Neoprene sleeve, 37 kW with Hytrel sleeve |
| Screw size | Setscrew |
| Setscrew torque requirement | 165 |
| Max parallel misalignment | 16 |
| Component WR2 (lbs ft2) | 0.5597 |
| Keyseat (in) | 3/4 x 3/8 |
| Capscrew size | Qty 4 -- 5/8 x 4 |
| Component WR? | 0.5597 |
| Screw type | Hub, spacer |
| Max RPM | 2800 |
| Torque rate | 9,360 (in-lbs) with EPDM or Neoprene sleeve; 31,500 (in-lbs) with Hytrel sleeve |
| Set screw distance | 1.625 |
| Dimension (in) (C) | 2 31/32 |
| Capscrew torque requirment (ft lbs) | 150 |
| SF hub diameter | 5.75 |
| Max angular misalignment | 1? with EPDM/neoprene sleeves and 1/4? with hytrel sleeves |
| Bore tolerance | +.0005 to +.0020 |
| Max compatible bore size | 3.9375 |
| Length through bore | 2.96875 |
| Coupling size | 12 |
| Torque | 9,360 in-lb with EPDM or Neoprene sleeve, 31,500 in-lb with Hytrel sleeve |
| Bore size (in) | 2 7/8 |
| Construction type | Finish bore with keyway |
| Keyseat size | 3/4 in x 3/8 in |

## Distributor availability

| Distributor | SKU | Price (USD) | Qty | Stock | MOQ |
| --- | --- | --- | --- | --- | --- |
| MRO Supply | 338489 | 262.97 | 1 | None | 1 |
| Applied Industrial | 105294260 |  |  | None | 1 |

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Structured data: `/python/html6/product/500/179500/part_--12SCH278---TBWoods--0e786e8214.json`  
Search API: https://www.dataalchemy.com/api/  
MCP server: https://www.dataalchemy.com/mcp