The EP-SPZ 3-Groove V-Belt Pulley Series groups 31 catalogue configurations around one buyer decision: a three-belt pulley for compact narrow V-belt drives. Rather than treating diameter alone as the model identity, selection stays tied to the listed P/O pair, shaft interface and E/F/J/K/L/M/N construction values.
The SPZ profile is 9.7 × 8 mm. In procurement language the same component may be called a V-belt pulley or sheave; keep the belt section unchanged unless the whole drive is being redesigned.
SPZ three-belt specifications
Use the complete table below to identify the exact EP- model. It retains 31 dimensional rows rather than creating a separate near-identical sales page for every diameter.
| EP Model | P (mm) | O (mm) | Type | Bush | Max Bore (mm) | E | F | J | K | L | M | N |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| EP-SPZ 63-03 | 63 | 67 | 8 | 1108 | 28 | - | 40 | 40 | 18 | 22 | - | - |
| EP-SPZ 67-03 | 67 | 71 | 8 | 1108 | 28 | - | 40 | 42 | 18 | 22 | - | - |
| EP-SPZ 71-03 | 71 | 75 | 8 | 1108 | 28 | - | 40 | 42 | 18 | 22 | - | - |
| EP-SPZ 75-03 | 75 | 79 | 8 | 1210 | 32 | - | 40 | 48 | 15 | 25 | - | - |
| EP-SPZ 80-03 | 80 | 84 | 8 | 1210 | 32 | - | 40 | 51 | 15 | 25 | - | - |
| EP-SPZ 85-03 | 85 | 89 | 8 | 1610 | 42 | - | 40 | 60 | 15 | 25 | - | - |
| EP-SPZ 90-03 | 90 | 94 | 8 | 1610 | 42 | - | 40 | 61 | 15 | 25 | - | - |
| EP-SPZ 95-03 | 95 | 99 | 8 | 1610 | 42 | - | 40 | 66 | 15 | 25 | - | - |
| EP-SPZ 100-03 | 100 | 104 | 8 | 1610 | 42 | - | 40 | 71 | 15 | 25 | - | - |
| EP-SPZ 106-03 | 106 | 110 | 8 | 1610 | 42 | - | 40 | 78 | 15 | 25 | - | - |
| EP-SPZ 112-03 | 112 | 116 | 8 | 2012 | 50 | - | 40 | 84 | 8 | 32 | - | - |
| EP-SPZ 118-03 | 118 | 122 | 8 | 2012 | 50 | - | 40 | 92 | 8 | 32 | - | - |
| EP-SPZ 125-03 | 125 | 129 | 2 | 2012 | 50 | - | 40 | 97 | - | 32 | 8 | - |
| EP-SPZ 132-03 | 132 | 136 | 2 | 2012 | 50 | - | 40 | 104 | - | 32 | 8 | - |
| EP-SPZ 140-03 | 140 | 144 | 2 | 2012 | 50 | - | 40 | 112 | - | 32 | 8 | - |
| EP-SPZ 150-03 | 150 | 154 | 2 | 2012 | 50 | - | 40 | 122 | - | 32 | 8 | - |
| EP-SPZ 160-03 | 160 | 164 | 2 | 2012 | 50 | - | 40 | 132 | - | 32 | 8 | - |
| EP-SPZ 170-03 | 170 | 174 | 2 | 2012 | 50 | - | 40 | 141 | - | 32 | 8 | - |
| EP-SPZ 180-03 | 180 | 184 | 2 | 2012 | 50 | - | 40 | 152 | - | 32 | 8 | - |
| EP-SPZ 190-03 | 190 | 194 | 6 | 2012 | 50 | 20 | 40 | 161 | 4 | 32 | 4 | 100 |
| EP-SPZ 200-03 | 200 | 204 | 6 | 2012 | 50 | 20 | 40 | 172 | 4 | 32 | 4 | 100 |
| EP-SPZ 224-03 | 224 | 228 | 6 | 2012 | 50 | 20 | 40 | 196 | 4 | 32 | 4 | 100 |
| EP-SPZ 250-03 | 250 | 254 | 5 | 2012 | 50 | - | 40 | 222 | 4 | 32 | 4 | 100 |
| EP-SPZ 280-03 | 280 | 284 | 4 | 2517 | 60 | - | 40 | 252 | 2.5 | 45 | 2.5 | 120 |
| EP-SPZ 315-03 | 315 | 319 | 4 | 2517 | 60 | - | 40 | 287 | 2.5 | 45 | 2.5 | 120 |
| EP-SPZ 355-03 | 355 | 359 | 4 | 2517 | 60 | - | 40 | 326 | 2.5 | 45 | 2.5 | 120 |
| EP-SPZ 400-03 | 400 | 404 | 4 | 2517 | 60 | - | 40 | 371 | 2.5 | 45 | 2.5 | 120 |
| EP-SPZ 450-03 | 450 | 454 | 4 | 2517 | 60 | - | 40 | 421 | 2.5 | 45 | 2.5 | 120 |
| EP-SPZ 500-03 | 500 | 504 | 4 | 2517 | 60 | - | 40 | 471 | 2.5 | 45 | 2.5 | 120 |
| EP-SPZ 630-03 | 630 | 634 | 4 | 2517 | 60 | - | 40 | 601 | 2.5 | 45 | 2.5 | 120 |
| EP-SPZ 800-03 | 800 | 804 | 4 | 3020 | 75 | - | 40 | 771 | 5.5 | 51 | 5.5 | 150 |
How this groove count changes selection
On a three-belt assembly, groove count fixes much of the face-width decision before the final diameter is chosen. Check the belt section and matched-belt requirement, calculate the ratio from P, verify O for surrounding clearance, then confirm the hub/bush dimensions for the exact row.
Typical application discussions for SPZ include compact fans, pumps, machine auxiliaries and space-constrained equipment. For this three-belt arrangement, pump and compressor drives where continuous duty and alignment matter; final belt capacity and shaft loading still need to be checked against the actual machine duty.
Installation and replacement focus
Replacement inspection should record the old belt marking, groove count and shaft/bush reference before the worn pulley is removed. Worn grooves can disguise the original geometry, so do not identify a replacement from outside diameter alone.
Identify
Read the SPZ belt marking and count the grooves before measuring the pulley.
Calculate
Use pitch/datum diameter for speed ratio; use outside diameter for space checks.
Confirm
Match shaft diameter, bush, key arrangement and the row-specific construction dimensions.
Questions to resolve before an RFQ
Which model row should I quote?
Quote the EP- designation whose P/O dimensions, groove count, bush and bore range match the machine. Add the shaft diameter and existing marking if it is a replacement.
Can another groove count be substituted?
Changing groove count changes pulley width and belt capacity. Treat that as a drive-design change rather than a direct replacement.
What if the old marking is unreadable?
Send belt markings, groove count, shaft size, photographs and measurable diameters/widths so the interface can be narrowed down.
Quote the exact row, not only the family
Send the selected EP- model, shaft diameter, driver and driven speeds, application and any drawing or replacement reference to [email protected].
