This three-belt SPA series is the catalogue path for buyers who already know the SPA belt section but still need to resolve diameter, shaft fit and construction details. Its listed pitch/datum diameter span is 71–1000 mm, with 32 dimensional configurations retained in the live specification table.
The SPA profile is 12.7 × 10 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.
SPA three-belt specifications
Use the complete table below to identify the exact EP- model. It retains 32 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-SPA 71-03 | 71 | 76.5 | 8 | 1108 | 28 | - | 50 | 40 | 28 | 22 | - | - |
| EP-SPA 75-03 | 75 | 80.5 | 8 | 1210 | 32 | - | 50 | 44 | 25 | 25 | - | - |
| EP-SPA 80-03 | 80 | 85.5 | 8 | 1210 | 32 | - | 50 | 47 | 25 | 25 | - | - |
| EP-SPA 85-03 | 85 | 90.5 | 8 | 1210 | 32 | - | 50 | 50 | 25 | 25 | - | - |
| EP-SPA 90-03 | 90 | 95.5 | 8 | 1610 | 42 | - | 50 | 60 | 25 | 25 | - | - |
| EP-SPA 95-03 | 95 | 100.5 | 8 | 1610 | 42 | - | 50 | 64 | 25 | 25 | - | - |
| EP-SPA 100-03 | 100 | 105.5 | 2 | 1610 | 42 | - | 50 | 70 | - | 25 | 25 | - |
| EP-SPA 106-03 | 106 | 111.5 | 2 | 1610 | 42 | - | 50 | 76 | - | 25 | 25 | - |
| EP-SPA 112-03 | 112 | 117.5 | 8 | 2012 | 50 | - | 50 | 83 | 18 | 32 | - | - |
| EP-SPA 118-03 | 118 | 123.5 | 2 | 2012 | 50 | - | 50 | 86 | - | 32 | 18 | - |
| EP-SPA 125-03 | 125 | 130.5 | 2 | 2012 | 50 | - | 50 | 92 | - | 32 | 18 | - |
| EP-SPA 132-03 | 132 | 137.5 | 2 | 2012 | 50 | - | 50 | 98 | - | 32 | 18 | - |
| EP-SPA 140-03 | 140 | 145.5 | 8 | 2517 | 60 | - | 50 | 106 | 5 | 45 | - | - |
| EP-SPA 150-03 | 150 | 155.5 | 8 | 2517 | 60 | - | 50 | 116 | 5 | 45 | - | - |
| EP-SPA 160-03 | 160 | 165.5 | 8 | 2517 | 60 | - | 50 | 126 | 5 | 45 | - | - |
| EP-SPA 170-03 | 170 | 175.5 | 8 | 2517 | 60 | - | 50 | 138 | 5 | 45 | - | - |
| EP-SPA 180-03 | 180 | 185.5 | 8 | 2517 | 60 | - | 50 | 146 | 5 | 45 | - | - |
| EP-SPA 190-03 | 190 | 195.5 | 8 | 2517 | 60 | - | 50 | 158 | 5 | 45 | - | - |
| EP-SPA 200-03 | 200 | 205.5 | 6 | 2517 | 60 | 20 | 50 | 165 | 2.5 | 45 | 2.5 | 120 |
| EP-SPA 212-03 | 212 | 217.5 | 6 | 2517 | 60 | 20 | 50 | 177 | 2.5 | 45 | 2.5 | 120 |
| EP-SPA 224-03 | 224 | 229.5 | 6 | 2517 | 60 | 20 | 50 | 189 | 2.5 | 45 | 2.5 | 120 |
| EP-SPA 250-03 | 250 | 255.5 | 6 | 2517 | 60 | 20 | 50 | 215 | 2.5 | 45 | 2.5 | 120 |
| EP-SPA 280-03 | 280 | 285.5 | 6 | 2517 | 60 | 20 | 50 | 245 | 2.5 | 45 | 2.5 | 120 |
| EP-SPA 315-03 | 315 | 320.5 | 7 | 3020 | 75 | 25 | 50 | 280 | 0.5 | 51 | 0.5 | 150 |
| EP-SPA 355-03 | 355 | 360.5 | 4 | 3020 | 75 | - | 50 | 320 | 0.5 | 51 | 0.5 | 150 |
| EP-SPA 400-03 | 400 | 405.5 | 4 | 3020 | 75 | - | 50 | 365 | 0.5 | 51 | 0.5 | 150 |
| EP-SPA 450-03 | 450 | 455.5 | 4 | 3020 | 75 | - | 50 | 415 | 0.5 | 51 | 0.5 | 150 |
| EP-SPA 500-03 | 500 | 505.5 | 4 | 3020 | 75 | - | 50 | 465 | 0.5 | 51 | 0.5 | 150 |
| EP-SPA 560-03 | 560 | 565.5 | 4 | 3020 | 75 | - | 50 | 525 | 0.5 | 51 | 0.5 | 150 |
| EP-SPA 630-03 | 630 | 635.5 | 4 | 3020 | 75 | - | 50 | 595 | 0.5 | 51 | 0.5 | 150 |
| EP-SPA 800-03 | 800 | 805.5 | 4 | 3535 | 90 | - | 50 | 765 | 19.5 | 89 | 19.5 | 170 |
| EP-SPA 1000-03 | 1000 | 1005.5 | 4 | 3535 | 90 | - | 50 | 965 | 19.5 | 89 | 19.5 | 178 |
How this groove count changes selection
Because three-belt layouts emphasize a balanced middle ground between axial width and multi-belt capacity, start with the required speed ratio and identify the nearest standard P value. Then compare O with the guard envelope, and only after that confirm whether the listed bush and maximum bore 28–90 mm range can accommodate the shaft.
Typical application discussions for SPA include agricultural machinery, compressors and pumps, industrial fans, woodworking and textile 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
For pump and compressor drives where continuous duty and alignment matter, alignment should be checked across both pulley faces after the bush is seated. Avoid using belt tension to pull a misaligned pulley into position; verify shaft seating and groove alignment first, then tension the matched belt set according to the belt supplier’s procedure.
Identify
Read the SPA 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].
