Sprocket 12A-2 (60-2) z=19 with hub

Product Description

Sprocket 12A-2 (60-2) z=19 with hub fits ASA 60 (12A-2) roller chain, double-strand (duplex), with a pitch of 19.05 mm (3/4"). It has 19 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 95 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

Applications

It is used in agricultural machinery, including seed drills, spreaders and grain conveyors. 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.

How do I check the pitch of a sprocket?

The sprocket pitch matches the chain pitch - it is the distance between the centres of adjacent teeth measured on the pitch circle. The easiest way to check it is to place a section of matching chain on the sprocket: it should sit on the teeth without tension. This sprocket has a pitch of 19.05 mm (3/4").

How is the pitch diameter of a sprocket calculated?

The pitch diameter Dp is the circle along which the chain rollers travel. It is calculated with the formula: pitch divided by the sine of (180° / number of teeth). For this sprocket it is 115.75 mm, and the outside diameter De is 125.63 mm.

When should I choose a sprocket with hub and when a plate wheel?

A sprocket with hub is chosen when it transmits torque directly from the shaft via a key - the hub provides a longer contact surface with the shaft and a more stable fit. Plate wheels are used mainly when the wheel is fixed to an existing flange or drum, or when there is little space on the shaft.

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.