Timing pulley PolyChain GT 14M z=38 for 68 mm belt, pilot bore, C45 steel

Product Description

Timing pulley PolyChain GT 14M z=38 for 68 mm belt, pilot bore, C45 steel is a synchronous pulley with PolyChain GT 14M teeth (pitch 14 mm), designed for a belt 68 mm wide. Number of teeth: 38. The pulley has teeth matched to PolyChain GT belts with a pitch of 14 mm, designed for high-power drives with a narrow belt. It is made of C45 steel.

The pitch diameter is 169.34 mm and the outside diameter 166.54 mm. The pulley has a hub with a pilot bore Ø32 mm, which is bored out to the shaft size and completed with a keyway or a set screw hole. The flanges (Ø183 mm) guide the belt and stop it running off the pulley.

Technical data

Applications

High-power drives with a narrow belt: fans, pumps, compressors, crushers, mills and heavy conveyors.

Frequently asked questions

Which timing pulley has the PolyChain GT 14M profile, 38 teeth and a pitch diameter of 169.34 mm?

This is the timing pulley PolyChain GT 14M z=38 for 68 mm belt, pilot bore, C45 steel. The outside diameter (over the tooth tips) is 166.54 mm. The pitch diameter is calculated as Dp = pitch × z / π = 14 × 38 / π.

Which timing belt fits this pulley?

A PolyChain GT 14M belt 68 mm wide. Standard HTD belts are not used with this pulley because the tooth shape is different.

Does this pulley work with an HTD 14M belt?

No. The PolyChain GT tooth shape differs from HTD, so the pulley and the belt must have the same PolyChain GT profile and the same pitch.

How do I prepare the bore for the shaft?

The pilot bore Ø32 mm is bored out on a lathe to the shaft size (usually to tolerance H7) and a keyway is cut to DIN 6885. The pulley is secured axially with a set screw in the hub. The maximum bore depends on the hub diameter (141 mm) - enough wall thickness must remain after machining.

How do I calculate the ratio of a drive with this pulley?

The ratio is the number of teeth of the driven pulley divided by the number of teeth of the driving pulley, e.g. 38 / 18 = 2.11. A timing belt drive has no slip, so the ratio is constant.

What are the flanges for?

The flanges guide the belt and prevent it from running off the pulley. In a typical drive it is enough for one of the two pulleys, usually the smaller one, to have flanges.

What does the lead time depend on?

When ordering, please check the current stock level of this pulley - 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 differ between warehouses.

Product photos are for illustration purposes only.