EP-SPB 400-08 V-Belt Pulley is an exact SPB eight-belt configuration with P 400 mm, O 407 mm, bush 4040 and a listed maximum bore of 100 mm. This is a large-diameter choice in the SPB family, so driven-speed reduction and available guard diameter become prominent checks.
At this large-diameter size, the ratio calculation should use P rather than O. O remains important for the guard and nearby structure, while the eight-belt face means an extra-wide belt bank with significant axial envelope. Check the row-specific E/F/J/K/L/M/N dimensions if an existing hub, shoulder or guard sits close to the pulley.
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 | SPB |
| Grooves | 8 |
| Pitch / datum diameter P | 400 mm |
| Outside diameter O | 407 mm |
| Construction type | 5 |
| Taper bush | 4040 |
| Maximum bore | 100 mm |
Where this model enters a drive decision
In application discussions this geometry is most relevant to large industrial assemblies where hub support, guard width and matched belt sets dominate the installation review. The wider SPB use context also includes larger pumps, compressors, material-handling systems and process machinery; however, the suitability of this exact model depends on power, speed, wrap, duty cycle and shaft loading rather than industry name alone.
Installation and replacement checks
Before fitting the taper bush, clean the shaft and mating taper, inspect the key arrangement and tighten the bush screws progressively. After seating, verify face alignment and belt tracking before final tensioning.
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 SPB eight-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.
