SEW-Eurodrive S77 Repair, Price & Specs
Helical-worm · ratios 6.8–288:1 · 1–10 hp. Every number you need before you commit: new, wholesale, used, scrap, competitor repair estimates — and our price, cheaper with a shorter lead time. Or sell your surplus S77 for cash today.
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S77 — full price & lead-time picture
| New / retail (OEM list)new unit, factory order | $1,200–$3,200 |
| Wholesale / dealervolume or distributor pricing | $960–$2,620 |
| Used (tested, working)secondhand market range | $480–$2,300 |
| Scrap valueweight-based, changes daily | $13–$33 |
Researched estimates anchored to OEM list pricing and live surplus-market data; new-unit factory lead time commonly runs 16–30 weeks for comparison. Send your nameplate for a confirmed number.
Why repair your S77 with us
Real numbers before teardown
Most shops quote only after your unit is in pieces on their bench. We publish the whole market — new, used, scrap, competitor repair — up front, so you negotiate from strength.
Cheaper and faster
Our network rate beats standard shop pricing by roughly 18–25% on the S77, with turnaround 2–3 days shorter — and 24–72 hour emergency rush when the line is down.
Two-way market maker
If repair isn't the smart move we say so, buy your unit for cash, and can supply a tested used replacement. No other gear shop gives you all three exits.
20+ years of industrial iron
Industrial Surplus World has bought, sold, and rebuilt SEW-Eurodrive equipment for decades — low-speed drives drives are daily work, not an experiment.
About the SEW-Eurodrive S77
The SEW-Eurodrive S77 is a helical-worm from the R / F / K / S / W series, MOVIGEAR line, rated 1–10 hp across ratios of 6.8–288:1, and most commonly found on low-speed drives. SEW-Eurodrive has arguably the largest gearmotor installed base in US industry — R (helical inline), F (parallel shaft), K (helical-bevel), S (helical-worm), W (Spiroplan) series plus MOVIGEAR mechatronics.
When a S77 fails, the real decision is economic: a new unit lists at $1,200–$3,200 with a 16–30 week factory queue, a tested used unit trades at $480–$2,300 when you can find one, and a standard shop rebuild runs $550–$1,920 over 10–15 business days. Our in-house network rate of $430–$1,570 in 8–12 business days beats all of those paths on total cost of downtime — and if the unit is beyond economic repair, its scrap weight alone is worth $13–$33, while we'll pay $60–$550 for the core as-is.
Typical failure modes on this family are bearing wear, shaft-seal leakage, and tooth-surface distress from degraded or contaminated oil. A correct rebuild means full teardown, hot-tank cleaning, magnetic-particle inspection of all gearing, verification of bearing-bore tolerances, all-new bearings, seals, shims and gaskets, reassembly to factory clearances, and a loaded run-test with warranty up to 24 months. Done right, it restores full service life at a fraction of replacement cost.
SEW-Eurodrive S77 specifications
| Brand / line | SEW-Eurodrive — R / F / K / S / W series, MOVIGEAR |
| Model / part number | S77 |
| Type | Helical-worm |
| Nominal ratios | 6.8–288:1 |
| Power / duty | 1–10 hp |
| Approx. weight | 150 lb |
| Typical applications | low-speed drives |
| Manufacturer base | Lyman, SC (US assembly) |
Confirm exact ratio and rating from your nameplate — we service and buy all configurations of the S77.
What a S77 rebuild includes
Teardown & clean
Full disassembly, hot-tank strip, oil passages cleared.
Inspect & magnaflux
All gearing NDT-checked for hidden cracks; bores measured.
New wear parts
All-new bearings, seals, shims, gaskets; seal surfaces reground.
Assemble & run-test
Set to factory clearances, painted, loaded run-test, warranty.