Sprocket 12A-2 (60-2) z=20 with hub
Available product promotions:
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Weight3,43kg
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UPC Code5908453533159
Product Description
Sprocket 12A-2 (60-2) z=20 with hub works with ASA 60 (12A-2) roller chain, double-strand (duplex), with a pitch of 19.05 mm (3/4"). It has 20 teeth and is made of C45 steel in accordance with ISO 606 and ANSI B29.1.
The sprocket has a one-sided hub with a diameter of 100 mm and a pilot bore of Ø20 mm, which is bored to the shaft size and completed with a keyway or a set screw hole. The total width of the sprocket is 50 mm.
Technical data
| Chain | ASA 60-2 / 12A-2 |
| Pitch | 19.05 mm (3/4") |
| Chain inner width | 12.7 mm |
| Roller diameter | 11.91 mm |
| Number of teeth | 20 |
| Pitch diameter Dp | 121.78 mm |
| Outside diameter De | 131.67 mm |
| Type | sprocket with hub |
| Hub diameter d | 100 mm |
| Pilot bore D | 20 mm |
| Total width H | 50 mm |
| Tooth width | 34.6 mm |
| Material | C45 steel |
| Weight | 3.43 kg |
| EAN | 5908453533159 |
Applications
It is found in woodworking machinery, industrial gate drives and winches. The double-strand version carries higher loads than a single-strand one of the same pitch, so it is chosen where there is no room for a chain with a larger pitch.
Frequently asked questions
Which chain does this sprocket fit?
ASA 60-2 (12A-2) roller chain with a pitch of 19.05 mm. A duplex sprocket requires a double-strand (duplex) chain.
Does it fit 12B chain?
No. 12B chain (European standard) has the same pitch, but a different roller diameter (12.07 mm instead of 11.91 mm) and a different inner width (11.68 mm instead of 12.7 mm). The ASA 60 sprocket is designed for American-standard chain, so the two systems should not be mixed.
Is this sprocket available in another version?
Yes. Also available: Sprocket 12A-1 (60-1) z=20 with hub.
What is the set screw hole in the hub for?
The threaded hole, usually made above the keyway or at 90° to it, takes a headless set screw. It prevents the sprocket from sliding along the shaft when the machine vibrates.
Can a sprocket with hub be welded to the shaft?
Technically it is possible, but we do not recommend it. Welding overheats the material, can bend the shaft and damage nearby bearings, and makes later replacement of a worn sprocket very difficult. It is better to fix the sprocket with a key.
What does the lead time depend on?
When ordering, please check the current stock level of this sprocket - the lead time depends on it and is clearly stated according to the quantity available in each warehouse. The stock level is shown above the product price and may vary depending on the warehouse.
Product photos are for illustration purposes only.
Product Features
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Weight3,43kg
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UPC Code5908453533159