About the NORD SK 91E
NORD Drivesystems' UNICASE design — a one-piece housing with no shaft seals — is one of the most reliable gear drive architectures in the industry. The absence of input/output shaft seals eliminates the most common failure point in conventional gear drives. NORD SK series units are found throughout US conveyor systems, packaging lines, and food processing plants, and their modular design makes them highly rebuildable.
The SK 91E is a unicase helical inline unit with a rated capacity of 2.2–30 kW and output torque of 2,600–9,100 Nm. Typical operating weight is 105–185 lbs. Mounting configurations include Foot, flange, shaft.
NORD units most commonly fail from bearing fatigue (especially in high-cycle conveyor applications), gear tooth wear from inadequate lubrication intervals, and housing damage from external impact on exposed mounting feet.
When your NORD SK 91E fails, downtime costs mount fast. Our standard rebuild turnaround is 8–14 business days with free freight both directions. Emergency 24–72 hour service is available. We publish pricing before teardown — no surprises.
Technical Specifications
| Model Number | SK 91E |
| Gear Type | UNICASE helical inline |
| Power Range | 2.2–30 kW |
| Output Torque | 2,600–9,100 Nm |
| Operating Weight | 105–185 lbs |
| Mounting Options | Foot, flange, shaft |
| Housing Material | UNICASE one-piece housing — no shaft seals on input/output |
| Parts Availability | NORD US distribution in Waunakee WI — most parts 1–5 day lead time |
| Industries Served | Conveyors, packaging, food & beverage, wastewater, logistics |
Why Repair Your NORD SK 91E Instead of Replacing It?
- NORD's UNICASE housing is cast iron and virtually indestructible — the housing is almost always reusable, making rebuild economics very favorable.
- NORD US maintains a large parts inventory in Waunakee, WI — most bearings and gear sets are available within 1–5 business days.
- SK series gearmotors can be rebuilt with the motor attached or separated — we handle both configurations.
Frequently Asked Questions — NORD SK 91E
What is NORD's UNICASE design and why does it matter for repair?
UNICASE is NORD's one-piece housing design — unlike conventional gear drives, there are no shaft seals on the input or output shafts. This eliminates the most common failure point (seal wear → oil loss → bearing failure). When a NORD unit does fail, it's almost always bearings or gears — both of which we rebuild. Call (641) 519-6270.
How long does a NORD SK series repair take?
Standard NORD rebuilds ship in 6–10 business days. We stock common bearings for SK 1SI through SK 9092.1 frames. Emergency 24–48 hour service available. Call (641) 519-6270.
Can you repair NORD gearmotors with the motor attached?
Yes — we can rebuild the gear unit with the motor in place for standard frame sizes. We can also separate, rebuild the gear unit, and reattach. Motor testing included. Call (641) 519-6270.
Do you buy surplus NORD gear drives?
Yes — we buy surplus, failed, and obsolete NORD units by the piece or pallet. Send a nameplate photo to surplus713@gmail.com for a same-day cash offer.
Related NORD Drivesystems Models
Pricing — NORD SK 91E
| New OEM UnitFactory list, 16–30 wk lead | $4,680–$14,040 |
| Used / SurplusTested, as-is condition | $630–$2,430 |
| Standard Shop RepairIndustry average, 10–18 days | $2,070–$6,209 |
| Our Rebuild Price8–14 business days, free freight | $1,800–$5,400 |
| Cash Buyback OfferWe buy as-is, same day offer | $216–$972 |
Estimates only. Final quote provided after free teardown inspection. Pricing varies by condition and damage.