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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.
MODEL 40BTB21
Contact supplier for technical support on: 323-728-8117
$71.81 Each
Prices are subject to change
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Typically Ships in: 1 day
Returnable: See conditions
Material
Steel
Number Of Teeth
21
Outside Dia
3.617"
Pitch
0.500 in.
| Material | Steel | Hub Configuration | B |
|---|---|---|---|
| Chain Number | 40 | Hub Outside Diameter | 2.781 in. |
| Chain Pitch | 0.500 in. | Hub Recessed For Chain | No |
| Number of Chain Rows | 1 | Construction Detail | Solid |
| Number of Teeth | 21 | Bore Type | Bushed TB |
| Outside Diameter | 3.617 in. | Bushing Part Number | 1610 |
| Pitch Diameter | 3.355 in. | Bushing Min Bore Size | 0.500 in. |
| Single Strand Tooth Thickness | 0.284 in. | Bushing Max Bore Size | 1.625 in. |
| Hardened Teeth | No |
| Storage Dimension Width | 4.313 in. | Individually Packaged | Yes |
|---|---|---|---|
| Storage Dimension Height | 1.060 in. |
SKU: 251157
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!!!
Read moreSKU: 263484
Solid product at a great price
Solid product, fair and super fast shipping! MROSUPPLY delivers it all!
Read moreSKU: 251697
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.
Read moreSKU: 250096
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.
Read more
#261213
Brand
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#261913
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Model
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#2265612
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HKK Chain
Model
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#261214
Brand
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40A14
#261914
Brand
Martin Sprocket
Model
40BTB21H
| Brand | NTN Bearing |
| Model | 6305HT200 |
SKU: 251157
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!!!
Read moreSKU: 263484
Solid product at a great price
Solid product, fair and super fast shipping! MROSUPPLY delivers it all!
Read moreSKU: 251697
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.
Read moreSKU: 250096
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.
Read moreItem must be unused.
Item must be in it's original package.
Restocking, shipping and handling fees may apply to any return with this manufacturer.
For more information please consult https://www.mrosupply.com/page/returnwarranty-policy/