# TB Woods M438 Sure-Grip QD Bushing - M Series, 4-3/8" Bore - MROSupply.com

***TB Woods M438 Sure-Grip QD bushing in the M series with a 4-3/8" finished bore. Cast-iron body with standard ANSI keyway and four 3/4-10 capscrews, rated for 125,000 in-lb torque capacity. Designed for the industry-standard QD interface on sheaves, sprockets, and couplings.***



## Product details:

- Catalog number: M438
- SKU: 337896
- Price: ***$618.67*** Each
- Shipping: ***FREE SHIPPING***  ON ORDERS OVER $100
- Typically Ships in: 1 day
- Brand: [TB Woods](https://www.mrosupply.com/brands/tb-woods/)
- Category: 
    - [Type M](htts://www.mrosupply.com/bushings/quick-disconnect-bushings/type-m/)
    - [Quick Disconnect Bushings](htts://www.mrosupply.com/bushings/quick-disconnect-bushings/)
    - [Bushings](htts://www.mrosupply.com/bushings/)
- Unit of measure: each
- Weight: 41.900 lb
- Technicall support: contact supplier for technical support on 888-829-6637


## Product images:
- https://static.mrosupply.com/images/noimage.webp


## Product attributes;

  
- Bolt circle: 7.88
  

  
- Bore: 4.375
  

  
- Bore (in): 4 3/8
  

  
- Capscrew designation (screw thread size): 3/4 10
  

  
- Capscrew length: 6.75
  

  
- Design: Standard
  

  
- Dimension: 6.75
  

  
- Hardware: Inch series
  

  
- Installation torque: 225
  

  
- Key size: 30
  

  
- Keyway: Standard
  

  
- Mounting: Standard
  

  
- Number of capscrews: 4
  

  
- Rating (in lbs): 125000
  

  
- Series: Sure-Grip® bushing
  

  
- Size: M
  

  
- TBW group no.: 11320
  

  
- Torque capacity: 125000
  

  
- Type: OD
  
## Product documents / software:

- [Catalog Product Section](https://documents.mrosupply.com/product_documents/N4/N412/sec-a1_yYxsZio.pdf)
- [Full Catalog](https://documents.mrosupply.com/product_documents/N4/N412/p-1687-tbw_ORsxZDt.pdf)
- [Installation And Maintenance Manual](https://documents.mrosupply.com/product_documents/N4/N412/p-5070-tbw_46RSr5N.pdf)
## Alternate products to `TB Woods M438 Sure-Grip QD Bushing - M Series, 4-3/8" Bore - MROSupply.com`:
- [Dodge 119927 Type M Quick Disconnect (QD) bushing with 4-3/8" finished bore and 1" x 1/2" keyway. Ductile iron construction provides high strength and durability for demanding power transmission applications. QD design enables fast, secure shaft mounting and easy removal without disturbing other components. Suitable for use with QD sheaves, sprockets, and pulleys in industrial drive systems.](https://www.mrosupply.com/products/118768/as-markdown/)
- [Martin M 4 3/8 Type M Quick Disconnect bushing with 4-3/8" bore, cast iron construction, and 1" x 1/2" keyway. Industry-interchangeable QD bushing for high-torque power transmission applications. Requires M-size QD hub (sold separately).](https://www.mrosupply.com/products/247772/as-markdown/)

## Product's reviews:
- Sales - I have all good experiences with your staff.
Thank you for the support.
- Sleeve - Thanks for quick service and delivery was not long!
- Didn’t use yet - I really didn’t use them yet but the belts I received were actually Carlisle belts which are made by Timken. I had ordered a belt that I knew was Carlisle at the same time to try out the difference brands and it was the same belt. The only difference was the TB Woods belt was $10 more per belt so you might as well just buy the Carlisle/ Timken directly.
- Great service! - It was all sent perfectly and on time