# Martin 50B21 Type B Plain Bore Sprocket #50 Chain 5/8" Pitch 21 Teeth Steel - MROSupply.com

***Martin 50B21 Type B plain bore roller chain sprocket for #50 chain (5/8" pitch), 21 teeth, 4.522" outside diameter. Steel construction with hub on one side for re-boring to required shaft size. Minimum plain bore requires finishing.***



## Product details:

- Catalog number: 50B21
- SKU: 263289
- Price: ***$53.24*** Each
- Shipping: ***FREE SHIPPING***  ON ORDERS OVER $100
- Typically Ships in: 1 day
- Brand: [Martin Sprocket](https://www.mrosupply.com/brands/martin-sprocket/)
- Category: 
    - [Type B Plain Bore Sprockets](htts://www.mrosupply.com/chains-sprockets/sprockets/roller-chain-sprockets/plain-bore-sprockets/type-b-plain-bore-sprockets/)
    - [Plain Bore Sprockets](htts://www.mrosupply.com/chains-sprockets/sprockets/roller-chain-sprockets/plain-bore-sprockets/)
    - [Roller Chain Sprockets](htts://www.mrosupply.com/chains-sprockets/sprockets/roller-chain-sprockets/)
    - [Sprockets](htts://www.mrosupply.com/chains-sprockets/sprockets/)
    - [Chains & Sprockets](htts://www.mrosupply.com/chains-sprockets/)
- Unit of measure: each
- Weight: 2.400 lb
- Technicall support: contact supplier for technical support on 323-728-8117


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


## Product attributes;

  
- Material: Steel
  

  
- Number Of Teeth: 21
  

  
- Outside Dia: 4.522"
  

  
- Pitch: 0.625 in.
  

## Suggested products:
- [Martin 50B21 Type B plain bore roller chain sprocket for #50 chain (5/8" pitch), 21 teeth, 4.522" outside diameter. Steel construction with hub on one side for re-boring to required shaft size. Minimum plain bore requires finishing.](https://www.mrosupply.com/products/263289/as-markdown/)
- [Martin 50A14 Type A plain bore roller chain sprocket for #50 chain with 5/8" pitch and 14 teeth. Steel construction with flat plate design and no hub for lightweight power transmission. Outside diameter is 3.113".](https://www.mrosupply.com/products/262471/as-markdown/)
- [Martin 50A13 Type A plain bore roller chain sprocket for #50 chain with 5/8" pitch, 13 teeth, and 2.911" outside diameter. Steel construction with flat plate design and no hub. Suitable for light-duty applications where a hub is not required.](https://www.mrosupply.com/products/262470/as-markdown/)
- [HKK RC050R1A (alt. 50R10) is a standard ANSI 50 single strand roller chain with 5/8" pitch, 10 ft reel. Features solid bushings and rollers, 0.200" pin diameter, 0.571" plate height, 0.080" plate thickness, 3/8" roller width, 0.400" roller diameter. Average ultimate strength 7,200 lbs, maximum allowable load 1,620 lbs. ANSI B29.1 compliant. Made in Japan.](https://www.mrosupply.com/products/2265642/as-markdown/)
- [Martin 50A12 Type A plain bore roller chain sprocket for #50 chain (5/8" pitch), 12 teeth, flat plate design with no hub. Steel construction. Outside diameter: 2.708".](https://www.mrosupply.com/products/262469/as-markdown/)

## Product's reviews:
- Great service - Very quick service part was exactly what I needed to get my skid steer going again great product and I will definitely use this business again
- Great service and selection - I was very pleased to find this on the shelf. The price was fair, and the delivery was prompt.
I will do business again with MRO
- Good stock - I was pleased with the help of customer service to answer my questions concerning inventory and how quickly I received my product. Thank you.
- High quality - strong material