# Martin 40BTB21H Taper-Lock Sprocket #40 Chain 1/2" Pitch 21 Teeth Hardened Teeth for 1610 Bushing Steel - MROSupply.com

***Martin 40BTB21H hardened tooth Taper-Lock sprocket for #40 roller chain (1/2" pitch). 21 teeth, 3.617" OD, uses 1610 series taper bushing (sold separately). Steel construction for industrial drives requiring extended wear resistance.***



## Product details:

- Catalog number: 40BTB21H
- SKU: 261914
- Price: ***$71.81*** Each
- Shipping: ***FREE SHIPPING***  ON ORDERS OVER $100
- Typically Ships in: 1 day
- Brand: [Martin Sprocket](https://www.mrosupply.com/brands/martin-sprocket/)
- Category: 
    - [Taper-Lock TL Sprockets](htts://www.mrosupply.com/chains-sprockets/sprockets/roller-chain-sprockets/taper-lock-tl-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: 0.800 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: 3.617"
  

  
- Pitch: 0.500 in.
  

## Alternate products to `Martin 40BTB21H Taper-Lock Sprocket #40 Chain 1/2" Pitch 21 Teeth Hardened Teeth for 1610 Bushing Steel - MROSupply.com`:
- [Martin 40BTB21 Taper-Lock sprocket for #40 roller chain (1/2" pitch), 21 teeth, 3.617" outside diameter, steel construction. Requires 1610 series taper bushing (sold separately). Industry-interchangeable with standard taper-lock bushings.](https://www.mrosupply.com/products/261913/as-markdown/)
## Suggested products:
- [Martin 40BTB21H hardened tooth Taper-Lock sprocket for #40 roller chain (1/2" pitch). 21 teeth, 3.617" OD, uses 1610 series taper bushing (sold separately). Steel construction for industrial drives requiring extended wear resistance.](https://www.mrosupply.com/products/261914/as-markdown/)
- [Martin 40A13 Type A plain bore roller chain sprocket for #40 chain with 1/2" pitch, 13 teeth, and 2.329" outside diameter. Flat plate design with no hub, steel construction. Suitable for light-duty applications where a simple, economical sprocket is required.](https://www.mrosupply.com/products/261213/as-markdown/)
- [Renold Jeffrey 40-1R PREMIUM ROLLER CHAIN 10 RIVETED](https://www.mrosupply.com/products/2182855/as-markdown/)
- [Martin 40A14 Type A plain bore roller chain sprocket for #40 chain (1/2" pitch) with 14 teeth. Flat plate design with no hub, made of steel. Outside diameter: 2.491". Compatible with ANSI B29.1 standard chain.](https://www.mrosupply.com/products/261214/as-markdown/)
- [Martin 40A112 Type A plain bore roller chain sprocket for #40 chain, 1/2" pitch, 112 teeth, 18.121" outside diameter. Flat plate design with no hub, steel construction. Suitable for applications requiring a lightweight, compact sprocket where hub projection is not needed.](https://www.mrosupply.com/products/261211/as-markdown/)

## Product's reviews:
- 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
- 70 tooth #41 chain sprocket - The sprocket arrived on time, fit perfectly and was priced well. MRO SUPPLY is your best choice for hard to find sprockets!
- Free freight ! - Easy to do business with
- Electric motor pulley sheave - Good selection of motor belt pulley sheaves. Found the size unit I was looking to fit to my new compressor motor. confirmed with manufacturers rep then ordered. Price was good and MRO ships out ASAP. Free shipping. If you need real soon have to pay for quicker shipping.