Sprocket 20B-1 z=13 with hub

Product Description

Sprocket 20B-1 z=13, with hub

Sprocket 20B-1 (pitch 1 1/4" - 31.75 mm), simplex, 13 teeth, with hub. Compliance with DIN 8187 / ISO 606 guarantees full interchangeability with a chain of the same pitch; the sprocket is made of C45E steel (EN 10083-1) in a non-hardened version - the standard choice for applications with moderate and medium load.

Technical data

Frequently asked questions

What does the pitch of a sprocket mean and how can it be checked?

The pitch of a sprocket corresponds to the chain pitch - it is the theoretical distance between the centres of adjacent teeth on the pitch circle. The easiest way to check it is to place a section of matching chain on the sprocket - it should sit perfectly, without tension.

How long can a sprocket be kept in storage without losing its properties?

A properly preserved sprocket (dried, coated with grease or anti-corrosion oil, stored in a dry room) can be kept in storage for many years without any loss of its mechanical parameters. The only risk is surface corrosion due to improper storage - it does not affect the tooth geometry, but it is advisable to clean the sprocket and preserve it again before installation.

How can you check whether the chain in an existing drive is already excessively elongated (stretched)?

Stretch out a section of a dozen or so chain links and compare its length with the catalogue dimension - an elongation of more than approx. 2-3% means the chain is due for replacement. A stretched chain no longer seats properly on the sprocket teeth, which accelerates the wear of both components, so it is better to replace it before it damages the sprocket as well.

If I order today, when will I receive the product?

Information on the lead time is given next to the product's stock level, above the price. If the sprocket is available in the main warehouse, we ship it no later than the next working day.

Where is this product used?

20B-1 sprockets operate in drives of construction machinery, goods lifts, aggregate conveyors and woodworking machines - wherever tooth durability under load matters.

When placing your order, please check the current stock level of this gear - the lead time depends on it and is clearly stated according to the quantity available in the given warehouse.

Product photos are for illustrative purposes only.