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Martin
140BTB21
Single Strand Sprocket; 140 Chain Size; 21 Teeth; Requires 3020 Taper Lock Bushing
Item #100803811
Alternate Products
- Single Strand Sprocket
- 140 Chain Size
- 21 Teeth
- Requires Taper Lock 3020 Bushing
- Without Hardened Teeth
features
- Tolerances meet or exceed ANSI standards
- Manufactured of high carbon steel
- Precise machining and processes ensure consistent finish and high quality
- Chain rows are parallel and precisely spaced to increase longevity of sprocket and chain
- Bores are concentric to pitch line, minimizing run out
- Interchangeable with other manufacturers’ Taper bushings
| Hardened Teeth | Without Hardened Teeth |
| Bushing Bore Size [Max] | 3 in |
| Length Through Bore | 2 in |
| Type | B |
| Material Internal Use | Carbon Steel |
| Inch/Metric | Inch |
| Outside Dia. | 12.66 in |
| Pitch Diameter | 11.74 in |
| Hub Dia. | 5 1/4 in |
| Caliper Diameter | 10.71 in |
| Chain Sprocket Pitch | 1.75 in |
| Material | Steel |
| Bushing Type | Taper Lock |
| Width Across Teeth | 0.924 in |
| Hub Length | 1.08 in |
| Single Strand Tooth Thickness | 0.924 in |
| Martin No. | 140BTB21 |
| Material External Use | Steel |
| Hub Projection | 1.08 in |
| O.D. | 12.66 in |
| Construction Internal | Welded |
| Chain No. | 140 |
| Bore Size [Max] | 3 in |
| Bushing Bore [Max] | 3 in |
| Bore Type | Bushed |
| Pitch Dia. | 11.742 in |
| Bore Size [Min] | 0.938 in |
| Bushing Bore [Min] | 0.938 in |
| Bushing Bore Size [Min] | 0.938 in |
| Bushing Series | 3020 |
| Chain Sprocket Number | 140 |
| No. of Teeth | 21 |
| No. of Teeth Rows Strands | 1 |
| Overall Length Less Threads | N/A |
| Tooth Width | 0.924 in |
| Sprocket Style | B |
| Hub O.D. | 5.25 in |
| Chain Pitch | 1.750 in |
| No. of Strands Across | 1 |
| Outside Dia. [Min] | 12.66 in |
| Overall Length | 2 in |
| Weight | 24.0 LB |
| EAN or UPC | 697950033037 |
