# Martin D40B30 Double Strand Roller Chain Sprocket #40 Chain 1/2" Pitch 30 Teeth Type B Plain Bore Steel - MROSupply.com

***Martin D40B30 double strand roller chain sprocket for #40 chain (1/2" pitch) with 30 teeth. Type B plain bore design with hub on one side, made from steel. Outside diameter 5.057". Suitable for power transmission applications requiring a double strand sprocket.***



## Product details:

- Catalog number: D40B30
- SKU: 256546
- Price: ***$99.72*** 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 Multi-Strand Sprockets](htts://www.mrosupply.com/chains-sprockets/sprockets/roller-chain-sprockets/multi-strand-sprockets/type-b-multi-strand-sprockets/)
    - [Multi-Strand Sprockets](htts://www.mrosupply.com/chains-sprockets/sprockets/roller-chain-sprockets/multi-strand-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: 5.340 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: 30
  

  
- Outside Dia: 5.057"
  

  
- Pitch: 0.500 in.
  


## Product's reviews:
- Martin s1036 gears - Great Item, for a great deal!
- Durable and high quality - I bought a second one to keep as a spare, but the first one still hasn’t shown any signs of wear. Seems like a quality part.
- 21 tooth 12 dp spur gear - The 21 tooth 12 DP gear I bought arrived very quickly.
It was exactly what I needed to fix my RV slide out.
I had to machine it to fit, but I knew that when I ordered it.
VERY SATISFIED!!!
- Service manager - on time.. great company thanks john gorth