V-belt pulley SPA 450/2, 2 grooves, for 65 mm locking assembly, cast iron

Product Description

V-belt pulley SPA 450/2, 2 grooves, for 65 mm locking assembly, cast iron is a V-belt pulley with SPA grooves made to ISO 4183 and DIN 2211, with a datum diameter of 450 mm. Number of grooves: 2. It is made of EN-GJL-200 grey cast iron, phosphated and statically balanced for a peripheral speed of up to 35 m/s.

The pulley has a Ø65 mm (H8) bore for a locking assembly (shaft clamping element) - the connection to the shaft is frictional, without a keyway, and the pulley is easy to position on the shaft. The face width is 35 mm with a groove pitch of 15 mm.

Technical data

Applications

Belt drives in construction and agricultural machinery, generating sets, centrifuges and production lines.

Frequently asked questions

Which V-belt pulley has the SPA profile, a datum diameter of 450 mm and 2 grooves?

This is the v-belt pulley SPA 450/2, 2 grooves, for 65 mm locking assembly, cast iron. The outside diameter is 455.5 mm and the face width 35 mm.

Which V-belt fits this pulley?

A narrow SPA V-belt (12.7 × 10 mm) to ISO 4184 / DIN 7753. Classical A belts (13 mm) to DIN 2215 also run in SPA grooves, but transmit less power. The number of belts equals the number of grooves (2).

How is the pulley mounted with a locking assembly?

A locking assembly with an outside diameter of 65 mm and a bore matching the shaft is inserted into the Ø65 mm bore (locking assembly sold separately). When the screws are tightened, it expands and connects the pulley to the shaft by friction, without a keyway. This mounting allows the pulley to be aligned precisely with the belt and removed easily.

How do I calculate the belt speed on this pulley?

Belt speed v = π × dp × n / 60 000, where dp is the datum diameter in mm and n is the speed in rpm. On this pulley at 1450 rpm the belt runs at approx. 34.2 m/s. The pulley is statically balanced up to 35 m/s.

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

The ratio is the datum diameter of the driven pulley divided by that of the driving pulley, e.g. 450 / 225 = 2. Because of the slight slip of the V-belt, the actual speed is approx. 1-2% lower.

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.