Sprocket 081-1 (1/2") z=33 with hub, C45 steel

Product Description

Sprocket 081-1 (1/2") z=33 with hub, C45 steel fits 081-1 roller chain (European standard DIN 8187 / ISO 606), single-strand (simplex), with a pitch of 12.7 mm (1/2"). It has 33 teeth and is made of C45 steel.

The sprocket has a one-sided hub with a diameter of 70 mm and a pilot bore of Ø16 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 20 mm.

Technical data

Applications

It is used in industrial automation drives, dosing equipment and printing machines.

Frequently asked questions

Which chain does the 081-1 z=33 sprocket fit?

081-1 roller chain to European standard DIN 8187 / ISO 606, with a pitch of 12.7 mm. A simplex sprocket requires a single-strand (simplex) chain.

What is the difference between the 081-1 sprocket and the 08B-1 sprocket if they have the same pitch?

Both sprockets have a pitch of 12.7 mm (1/2"), but they are designed for different chains. The 081-1 chain has an inner width of 3.3 mm and a roller diameter of 7.75 mm, while the 08B-1 chain has an inner width of 7.75 mm and a roller diameter of 8.51 mm. That is why the 081-1 sprocket has a narrower toothed rim (3 mm instead of 7.2 mm) and should not be used with 08B-1 chain, nor should these series be interchanged.

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 12.7 mm (1/2").

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 133.60 mm, and the outside diameter De is 139.6 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.