# TB Woods 644B V-Belt Sheave - 4-Groove, 6.75" OD, A-B Section, SD Bushed - MROSupply.com

***TB Woods 644B conventional V-belt sheave with 4 grooves, 6.75" outside diameter, and A-B belt section. Cast-iron construction with SD quick-disconnect bushing for easy installation. Balanced to one plane for smooth operation in industrial belt drives.***



## Product details:

- Catalog number: 644B
- SKU: 347461
- Price: ***$206.25*** Each
- Shipping: ***FREE SHIPPING***  ON ORDERS OVER $100
- Typically Ships in: 1 day
- Brand: [TB Woods](https://www.mrosupply.com/brands/tb-woods/)
- Category: 
    - [B/5L Section](htts://www.mrosupply.com/sheaves/quick-detachable-bushed-bore-sheaves/b5l-section/)
    - [Quick Detachable Bushed Bore Sheaves](htts://www.mrosupply.com/sheaves/quick-detachable-bushed-bore-sheaves/)
    - [Sheaves](htts://www.mrosupply.com/sheaves/)
- Unit of measure: each
- Weight: 13.200 lb
- Technicall support: contact supplier for technical support on 888-829-6637


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


## Product attributes;

  
- Balance: Standard, 1 plane
  

  
- Belt section: A-B
  

  
- Bore type: Quick disconnect bushing
  

  
- Bushing: SD
  

  
- Component WR2 (lbs ft2): 0.60
  

  
- Datum diameter: 6.4
  

  
- Dimension: 1.81
  

  
- Dimension (E): 0.69
  

  
- Dimension (L): 1.81
  

  
- Dimension (M): 0.75
  

  
- Face width: 3.25
  

  
- Face width (in): 3.25
  

  
- Groove cross section section: A-B
  

  
- Hub location: 1.31
  

  
- Hub location (in): 1.31
  

  
- I.D.: 5.06
  

  
- Inertia WR²: 61
  

  
- Inside diameter (in): 5.06
  

  
- Material type: CI
  

  
- Max RPM: 3710
  

  
- Number of grooves: 4
  

  
- O.D.: 6.75
  

  
- Outside diameter (in): 6.75
  

  
- Pitch diameter: 6.81
  

  
- RPM upper limit: 3710
  
## Product documents / software:

- [Catalog Product Section](https://documents.mrosupply.com/product_documents/AP/AP110/sec-b2_0VH8bo9.pdf)
- [Full Catalog](https://documents.mrosupply.com/product_documents/N4/N412/p-1687-tbw_ORsxZDt.pdf)
- [Service Manual](https://documents.mrosupply.com/product_documents/2B/2BK57118/p-1688-tbw_0MqPcK4.pdf)
## Alternate products to `TB Woods 644B V-Belt Sheave - 4-Groove, 6.75" OD, A-B Section, SD Bushed - MROSupply.com`:
- [Dodge 455657 4A6.0B6.4-SD Quick Disconnect sheave, 4-groove A/B dual section, 6.0" A-pitch diameter, 6.4" B-pitch diameter, SD bushing for 7/16" to 2" bore. Cast iron construction with gray finish for industrial V-belt drives. 6-3/4" outside diameter.](https://www.mrosupply.com/products/136474/as-markdown/)
- [Martin 4 B 64 SD is a, 4-groove B-section V-belt sheave, with 6.4" pitch diameter, for SD bushing, in steel.](https://www.mrosupply.com/products/254944/as-markdown/)

## Product's reviews:
- Sales - I have all good experiences with your staff.
Thank you for the support.
- Great service! - It was all sent perfectly and on time
- Muy buen servicio y rapidez en la entrega - Primera vez q compro con esta compañía, recomiendo ampliamente comprar con ellos y claro q volveria a comprar otra vez muy buen servicio y entrega rapida
- 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.