Sprocket 20B-3 z=38 with hub

Product Description

Sprocket 20B-3 z=38, with hub

Sprocket 20B-3 (pitch 1 1/4" - 31.75 mm), triplex (three-strand), 38 teeth, with hub. As a European manufacturer, Ozdowski supplies the sprocket in C45E steel (EN 10083-1), in accordance with DIN 8187 / ISO 606 - a version without tooth hardening, cheaper than the hardened variant and sufficient for many typical industrial applications.

Technical data

Frequently asked questions

How do you select a sprocket when the machine lacks space for a larger pitch?

In such a situation, a better solution than increasing the pitch is often to use a multi-strand chain and sprocket of the same (smaller) pitch - several strands together carry a greater load without increasing the sprocket diameter.

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.

Does a larger number of teeth always mean a longer service life for the sprocket?

Largely yes - the more teeth are engaged, the lower the load on each individual tooth, and the chain runs over a larger wrap angle, which reduces dynamic impacts. Very small sprockets (with fewer than fifteen or so teeth) wear the fastest and are best avoided if the drive design allows.

What is a technological bore in a sprocket and why is it left?

We manufacture sprockets with hub with a small, so-called pilot (preliminary) bore. We leave it deliberately so that the customer (or workshop) can bore it precisely to the exact shaft size of their machine.

Where is this product used?

20B-3 sprockets are used in industrial drive transmissions: conveyors, feeders, packaging machines and production lines where precise, repeatable torque transmission 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.