# TB Woods 685B Sure-Grip QD Bushing - SK Series, 5-Groove A-B Sheave, 6.8" Datum Diameter - MROSupply.com

***TB Woods 685B Sure-Grip QD bushing for a 5-groove A-B section V-belt sheave with 6.8" datum diameter and 7.15" outside diameter. SK series bushing with quick-disconnect bore type, cast-iron construction, and standard single-plane balance. Rated for up to 3500 RPM. Face width 4", pitch diameter 7.21", and WR² inertia 88 lb-ft².***



## Product details:

- Catalog number: 685B
- SKU: 345707
- Price: ***$279.69*** 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: 16.200 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: SK
  

  
- Component WR2 (lbs ft2): 0.87
  

  
- Datum diameter: 6.8
  

  
- Dimension: 1.88
  

  
- Dimension (E): 0.59
  

  
- Dimension (L): 1.88
  

  
- Dimension (M): 1.53
  

  
- Face width: 4
  

  
- Face width (in): 4.00
  

  
- Groove cross section section: A-B
  

  
- Hub location: 1.31
  

  
- Hub location (in): 1.31
  

  
- I.D.: 5.44
  

  
- Inertia WR²: 88
  

  
- Inside diameter (in): 5.44
  

  
- Material type: CI
  

  
- Max RPM: 3500
  

  
- Number of grooves: 5
  

  
- O.D.: 7.15
  

  
- Outside diameter (in): 7.15
  

  
- Pitch diameter: 7.21
  

  
- RPM upper limit: 3500
  
## 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 685B Sure-Grip QD Bushing - SK Series, 5-Groove A-B Sheave, 6.8" Datum Diameter - MROSupply.com`:
- [Browning 5B68SK 1005297 5-groove cast iron B-section multiple sheave with a 6.8-inch pitch diameter and SK Q-D bushed bore. Precision-machined grooves and static balancing ensure low-vibration operation. Used in fan drives, blower drives, pump drives, and general HVAC and industrial belt drives.](https://www.mrosupply.com/products/2287109/as-markdown/)
- [Dodge 455692 5A6.4B6.8-SK 5-groove A/B dual section V-belt sheave with 6.4" A-pitch diameter and 6.8" B-pitch diameter, SK Quick Disconnect bushing. Cast iron construction with gray finish, 7.15" outside diameter, and bore range 7/16" to 2-5/8". Suitable for classical A and B section V-belts in industrial power transmission applications.](https://www.mrosupply.com/products/135792/as-markdown/)
- [Martin 5 B 68 SK conventional QD sheave for B-section (5L) V-belts. 5 grooves, 6.8" pitch diameter, uses industry-standard SK quick-disconnect bushing (sold separately). Cast iron construction for durability in industrial drives.](https://www.mrosupply.com/products/255190/as-markdown/)

## Product's reviews:
- 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
- Tb woods - Excelent recomiendo 100%
- Sleeve - Thanks for quick service and delivery was not long!