# Boston Gear 30223161 F631B-4-B9 Helical Speed Reducer 4:1 Ratio 180TC Input Flange - MROSupply.com

***Boston Gear 30223161 F631B-4-B9 helical speed reducer with 4:1 ratio and 180TC input flange. Cast iron housing for general industrial drive applications.***



## Product details:

- Catalog number: F631B-4-B9
- SKU: 41105
- Price: ***$3,970.29*** Each
- Shipping: ***FREE SHIPPING***  ON ORDERS OVER $100
- Typically Ships in: 1 day
- Brand: [Boston Gear](https://www.mrosupply.com/brands/boston-gear/)
- Category: 
    - [Right Angle Helical/Spiral Bevel Speed Reducers](htts://www.mrosupply.com/speed-reducers/right-angle-speed-reducers/right-angle-helicalspiral-bevel-speed-reducers/)
    - [Right Angle Speed Reducers](htts://www.mrosupply.com/speed-reducers/right-angle-speed-reducers/)
    - [Speed Reducers](htts://www.mrosupply.com/speed-reducers/)
- Unit of measure: each
- Weight: 40.002 lb
- Technicall support: contact supplier for technical support on 800-626-2120


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


## Product attributes;

  
- Ratios from 1.6: 1 to 160:1 (23 increments)
  

  
- Standards: ISO 9001
  
## Product documents / software:

- [Data Sheet](https://documents.mrosupply.com/product_documents/41/00/41007/p-1485-bg_600b-series-helical_bpEi8qZ.pdf)

## Product's reviews:
- Shaft output is reversible - Description should say that shaft is reversible. Other than that perfect fit. Good communication from the shipping folks.
- 12d.p. 14t spur gear - This item was closer to exactly what I needed than I had thought possible to find in the last 75 or so years. quite affordable, too. I almost didn't look, but when I did, there it was. I had in hand in just a couple of days.
- Exactly what i needed - Item was exactly what I needed and a perfect fit for my project. Extremely happy.
- Quality - very high quality. using these gears in a model 9 cylinder radial engine with a 1"
bore. about 8 h.p. , for oil pump a scavenge pump timing gears and distributor . very good quality gears.