# Boston Gear 30233528 721-20-G 20:1 Worm Gear Speed Reducer 2.1" Center Distance Solid Input Shaft 1" Output Bore - MROSupply.com

***Boston Gear 30233528 721-20-G 20:1 single reduction worm gear speed reducer with 2.1" center distance. 700 Series cast iron housing with solid projecting input shaft and left side solid output shaft. Output bore diameter is 1".***



## Product details:

- Catalog number: 721-20-G
- SKU: 42391
- Obsolete: This item is no longer available on MROSupply.com, however we
have this identical replacement you can see here - [Boston Gear 30791494 7721-20-G open gear with 20:1 ratio for general industrial power transmission. Robust construction for moderate-duty speed reduction applications.](https://www.mrosupply.com/products/96821795/as-markdown/)
- Shipping: ***FREE SHIPPING***  ON ORDERS OVER $100
- Typically Ships in: 1 day
- Brand: [Boston Gear](https://www.mrosupply.com/brands/boston-gear/)
- Category: 
    - [Solid Input Shaft Solid Output Shaft Left Worm](htts://www.mrosupply.com/speed-reducers/right-angle-speed-reducers/right-angle-worm-gear-speed-reducers/solid-input-shaft-worm-gear-reducers/solid-input-shaft-solid-output-shaft-left-worm/)
    - [Solid Input Shaft Worm Gear Reducers](htts://www.mrosupply.com/speed-reducers/right-angle-speed-reducers/right-angle-worm-gear-speed-reducers/solid-input-shaft-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: 24.100 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: 0.625"
  

  
- Input Style: Solid Input Shaft
  

  
- Input Type: Input Shaft
  

  
- Output: Left
  

  
- Output Type: Solid Output Shaft
  

  
- Paint/Coating: Gray
  

  
- Ratio: 20 to 1
  

  
- Reduction: Single
  

  
- Shaft Projection: Left Side
  


## Product's reviews:
- 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.
- Good seller - Catalogue item, good price, fast delivery = good seller
- Fast shipping - I ordered this part hoping it would arrive within 2 weeks because I had an emergency situation with an employee waiting to repair a piece of equipment at a customer’s location. The part actually arrived halfway across the country in 5 days including the weekend. MRO processed, packaged and shipped it with incredible speed. Thanks again!
- Gear box oil - This has been very hard to find. It’s the oil spec’ed for my 1950s Rockwell wedge bed planer gear box. I haven’t found it anyplace else.