# Boston Gear 30224161 SF721-20-B7-G 20:1 Worm Gear Speed Reducer, 2.1" Center Distance, 140TC Quill Flange, Left Solid Output Shaft - MROSupply.com

***Boston Gear 30224161 SF721-20-B7-G 20:1 single reduction worm gear speed reducer with 2.1" center distance. 700 Series cast iron housing with quill flange input and screw conveyor adapter for 140TC NEMA C-face motor. Left-side solid output shaft with 1" diameter. Designed for general industrial power transmission applications.***



## Product details:

- Catalog number: SF721-20-B7-G
- SKU: 5994162
- Price: ***$1,134.37*** Each
- Shipping: ***FREE SHIPPING***  ON ORDERS OVER $100
- Typically Ships in: 1 day
- Brand: [Boston Gear](https://www.mrosupply.com/brands/boston-gear/)
- Category: 
    - [140TC Input Flange](htts://www.mrosupply.com/speed-reducers/right-angle-speed-reducers/right-angle-worm-gear-speed-reducers/quill-input-worm-gear-reducers/quill-input-hollow-bore-output-worm-gear-reducers/140tc-input-flange/)
    - [Quill Input Hollow Bore Output Worm Gear Reducers](htts://www.mrosupply.com/speed-reducers/right-angle-speed-reducers/right-angle-worm-gear-speed-reducers/quill-input-worm-gear-reducers/quill-input-hollow-bore-output-worm-gear-reducers/)
    - [Quill Input Worm Gear Reducers](htts://www.mrosupply.com/speed-reducers/right-angle-speed-reducers/right-angle-worm-gear-speed-reducers/quill-input-worm-gear-reducers/)
    - [Right Angle Worm Gear Speed Reducers](htts://www.mrosupply.com/speed-reducers/right-angle-speed-reducers/right-angle-worm-gear-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: 26.100 lb
- Technicall support: contact supplier for technical support on 800-626-2120


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


## Product attributes;

  
- Bore/Shaft Diameter: 1"
  

  
- Center Distance: 2.1"
  

  
- Input Size: 140TC
  

  
- Input Type: Flange
  

  
- Output Type: Solid Output Shaft
  

  
- Ratio: 20 to 1
  

  
- Reduction: Single
  

  
- Shaft Projection: Left Side
  
## Product documents / software:

- [Product Catalog](https://documents.mrosupply.com/product_documents/40/43/40438/p-1485-bg_ktFPQTc.pdf)
- [Service Manual](https://documents.mrosupply.com/product_documents/40/43/40438/p-3009-bg_HJSsUK8.pdf)

## Product's reviews:
- Speed reducer purchase - The purchase was easy it did take two purchase until we got the correct part I guess it was a fault on both parts as we were looking at the wrong part number, but overall the purchase was good part fit perfectly. Thanks for your support.
- Change gears - Found what I needed, fair price,...fast delivery....All Good!! Good job MRO Supply!
- Shaft output is reversible - Description should say that shaft is reversible. Other than that perfect fit. Good communication from the shipping folks.
- New lead screw gear. - Used this gear on a new lead screw l made for my old 1919 LeBlond belt drive lathe. It worked great for my application.