For replacement or a new drive using the SPZ section, EP-SPZ 630-03 V-Belt Pulley provides a defined three-belt reference point. P is 630 mm and O is 634 mm, while the catalogue associates the model with bush 2517 and maximum bore 60 mm.
A very-large diameter SPZ pulley should be checked as part of the whole belt drive. Confirm the mating pulley section, belt set, shaft/key interface and alignment path; then use the dimensional row to close out guard clearance and hub-space questions before purchase.
Engineering data for this configuration
The table is generated from the model metadata imported with this product, keeping the exact P/O, type, bush, maximum bore and construction dimensions together.
| Parameter | Value |
|---|---|
| Profile | SPZ |
| Grooves | 3 |
| Pitch / datum diameter P | 630 mm |
| Outside diameter O | 634 mm |
| Construction type | 4 |
| Taper bush | 2517 |
| Maximum bore | 60 mm |
Where this model enters a drive decision
A useful RFQ for this model links the geometry to a real machine: identify whether it serves a fan, pump, compressor, agricultural drive, material-handling system or another duty; then give power, speeds, environment and shaft details so the selected SPZ row can be checked.
Installation and replacement checks
For dusty or difficult-service equipment, include groove inspection in maintenance. Packed debris and groove wear can alter belt seating; replace a worn pulley by dimensional reference rather than compensating with excessive tension.
Measure the shaft
Record shaft diameter and key arrangement before ordering the bush/bore combination.
Check ratio and clearance
Use P for ratio; use O and the face/hub dimensions for physical space.
Align the drive
Seat the pulley correctly before belt tension is applied and check both pulley faces.
Buyer questions for SPZ three-belt pulleys
What should I quote for this exact model?
Use the EP- model above and include shaft diameter, quantity, application, driver speed and driven speed. Add a photo or drawing for replacement work.
Should I calculate with outside diameter?
Use the pitch/datum diameter for the theoretical pulley speed ratio. Outside diameter is mainly a physical-envelope check.
Can the bore be enlarged beyond the listed maximum?
Treat the listed maximum bore as the limit for this catalogue configuration. If the shaft is larger, select a different model/bush arrangement or request an engineering review.
Send the machine interface with the model
Email [email protected] with this EP- designation, shaft diameter, speeds, quantity and any old-pulley reference.
