Service and warranty
We support your equipment at every stage — from selection to operation.
- 01
Technical support
Technical seminars, design and selection support, acceptance criteria, installation and maintenance advice — before, during and after the sale.
- 02
24-hour response
We respond within 24 hours of your request and carry out the plan agreed with you. If the cause lies in the product, the manufacturer bears the cost.
- 03
18-month warranty
18 months from shipment or 12 months from start of operation, whichever comes first. If a fault is caused by the product, the manufacturer bears the cost.
01
Installing and operating worm gear reducers
- Mount on a flat, rigid base with foundation bolts fully tightened and no vibration.
- Motor, reducer and driven-machine shafts must be aligned.
- Shaft tolerances are j6 and h6. Couplings, pulleys and sprockets must fit properly: too tight damages bearings, too loose impairs torque transmission.
- Fit sprockets and gears as close to the bearing as possible to reduce shaft bending.
- Grease the worm input bore and keyway before fitting the motor to prevent seizure and rust.
- A heavier-than-usual motor mounted on the reducer needs an extra support.
- Keep worm input speed preferably at or below 1500 rpm. On first start, load gradually — never start under full load.
- Sizes 025–090 are filled for life with ISO VG 320 synthetic oil. Sizes 110–150 use ISO VG 460 mineral oil: first change after 1000 h, then every 4000 h.
- Maximum oil temperature is 95 °C; if reached, stop and inspect the drive.
- After 4–6 months of storage with dry oil seals, replace the seals before start-up.
Oil quantity in NMRV/NRV worm reducers
| Sizes | 025 | 030 | 040 | 050 | 063 | 075 | 090 |
|---|---|---|---|---|---|---|---|
| Oil, L | 0.02 | 0.04 | 0.08 | 0.15 | 0.3 | 0.55 | 1 |
Sizes 025–090: ISO VG 320 synthetic oil, factory-filled, same quantity in any mounting position. For 110–150 the quantity depends on the mounting position — please ask the manufacturer.
02
Worm gear reducer troubleshooting
| Symptom | Possible cause | What to do |
|---|---|---|
| Overheating | misalignment with motor and machine, overload | realign; reduce load to rated value |
| Overheating | oil-seal friction; too much, too little or dirty oil | lubricate the seal lip; correct oil level; replace oil |
| Vibration | poor mounting, loose bolts | locate and tighten |
| Vibration | worn worm-gear teeth or bearings | replace worm gear set (manufacturer can help) or bearings |
| Noise | misalignment, damaged bearing, poor mesh, low oil | realign; replace bearing; repair gear set; add oil |
| Oil leakage | worn seal lip or shaft at the seal | replace seal; replace shaft |
| Oil leakage | loose plug, damaged oil gauge | tighten plug; replace gauge |
| Rapid tooth wear | overload, wrong or insufficient oil, late oil change, overheating | reduce load; correct oil and quantity; change on schedule |
Electric motor troubleshooting
| Symptom | Possible cause | What to do |
|---|---|---|
| Will not start with no load | open supply line or winding phase; wrong voltage or frequency | check voltage, connections, fuses and winding resistance |
| Slows sharply or stalls under load | low voltage, turn-to-turn short, open phase, overload | check voltage, winding resistance, no-load current and the load |
| Runs slowly and hums | a winding phase reversed; broken rotor bars | check lead markings and phase currents |
| Stator overheats | open phase, voltage too high or low, overload, short circuit, poor ventilation | check fuses, voltage, current, insulation and air passages |
| Bearings overheat | poor assembly, misalignment, missing or dirty grease, over-tight belt | align shafts, replace grease, slacken the belt |
| Protection trips on switch-on | phase reversed, star winding connected in delta, short to frame | check connection and insulation |
| Excessive vibration | unbalanced rotor or pulley, large axial play | check balance, adjust clearances |
Based on the manufacturer’s catalogs.