Technical Specifications — NK40B / NK40C Coupling Sprocket
| Параметр |
Значення |
Нотатки |
| Model |
NK40B / NK40C |
Asian Standard Series |
| Крок |
12.700 mm |
|
| Tooth Range |
Z=9 – 90 |
|
| Hub Type |
B Type Solid / A2 Type Weld |
|
| Bore Range |
Stock bore to max bore |
Finished bore available |
| Матеріал |
Вуглецева сталь C45 |
Hardened teeth |
| Твердість зуба |
Твердість HRC 50–60 |
Induction hardened |
| Surface |
Black oxide / Zinc plated |
|
| Coupling Type |
Roller chain coupling (duplex wrap) |
|
Key Features
Roller Chain Flexible Coupling
Two coupling sprockets and a length of double-strand (duplex) roller chain form a compact flexible coupling that tolerates angular misalignment up to 1° and parallel offset up to 0.5 mm.
Shock-Load Absorption
The roller chain element absorbs shock and vibration between motor and load — protecting gearboxes, pumps, and driven machines from torque spikes common in start-stop operations.
⚙️
Easy Maintenance
Chain coupling disassembly requires only disconnecting the roller chain link — no alignment tools or heat required. Chain replacement restores full coupling performance without disturbing shaft alignment.
High Torque Capacity
Double-strand roller chain wraps two tooth profiles simultaneously, providing significantly higher torque capacity per unit diameter than jaw or disc couplings of equivalent size.
Сумісність
The NK40B / NK40C coupling sprocket is used as a matched pair with a duplex (double-strand) roller chain forming a complete roller-chain coupling. Both sprockets must be the same model and tooth count. Bore finished to your shaft diameter; keyway and set-screw included on solid-hub types. Зв'яжіться з нашою командою for torque and misalignment calculations.
Застосування
Pump Drives
Motor-to-pump coupling in water treatment, mining dewatering, and agriculture
Agricultural PTO
PTO shaft coupling on tractors, balers, and irrigation pump drives
Fan & Blower Drives
HVAC fan, industrial blower, and cooling tower motor-to-shaft coupling
⛏️ Gearbox Coupling
Motor-to-gearbox flexible coupling on conveyor, crusher, and mixer drives
Відгуки клієнтів
Alan W. ★★★★★ Australia
“NK40B / NK40C coupling sprockets fitted to our pump drives — running flawlessly for 18 months with no chain replacement needed yet. Excellent value.”
NK40B / NK40C Z=9 Coupling Sprocket · March 2025
Dieter H. ★★★★★ Germany
“Bore tolerance is excellent — h6 shaft fit, zero wobble. The chain coupling performs quieter than the jaw coupling it replaced.”
NK40B / NK40C Z=12 Coupling Sprocket · January 2025
Asha R. ★★★★☆ South Africa
“Good quality. Delivery to Johannesburg took 12 days — acceptable. Would have given 5 stars with faster freight.”
NK40B / NK40C Z=10 Coupling Sprocket · February 2025
Brett M. ★★★★★ New Zealand
“Perfect for our irrigation pump coupling refurbishment. Fitted both sprockets and new chain in under an hour.”
NK40B / NK40C Z=11 Coupling Sprocket · April 2025
Найчастіші запитання
► How many teeth do I need for a coupling sprocket pair?
Both coupling sprockets must have the same tooth count. The most common tooth counts are 9, 10, 11, and 12. More teeth = smoother operation but larger coupling diameter.
► What chain do I use with coupling sprockets?
Roller chain coupling assemblies use a length of double-strand (duplex) roller chain in the appropriate pitch. The chain pitch must match the sprocket pitch exactly.
► How much misalignment can a roller chain coupling tolerate?
Typically ±1° angular misalignment and ±0.5 mm parallel offset at the rated torque. Misalignment beyond these limits increases chain and sprocket wear significantly.
► Do you supply the complete coupling set (sprocket pair + chain)?
Yes. We can supply matched pairs of coupling sprockets with the appropriate length of duplex chain and chain housing (cover) as a complete coupling kit. Contact us for full kit pricing.
► What is the maximum torque for the NK80B coupling sprocket?
Torque capacity depends on tooth count and chain pitch. For NK80B Z=10, typical rated torque is 350–500 Nm depending on speed. Contact our engineering team for a precise calculation for your application.
- Finish-bore both coupling sprockets to the respective shaft diameters; cut keyways to drawing.
- Mount sprockets on their respective shafts; align shafts using a dial indicator — target less than 0.1 mm TIR on coupling hub face.
- Wrap the duplex roller chain around both sprockets and close with a connecting link.
- Install the chain coupling housing (cover) if required for guard compliance or lubrication retention.
- Verify shaft alignment monthly during the first 3 months of operation and re-check after any unexpected load or vibration event.
✓ ISO 9001:2015✓ ANSI B29.1✓ ISO/DIN 8187✓ JIS B 1801✓ Стандарти BS/DIN✓ Стандарти Великої Британії
Чому варто обрати Ever-power Australia?
Ми є вертикально інтегрованим виробником з понад 25-річним досвідом роботи у сфері ланцюгових приводів. Наше підприємство займає площу 35 000 м² та виробляє понад 4 мільйони зірочок на рік. Ми постачаємо продукцію партнерам OEM, дистриб'юторам та прямим промисловим покупцям по всій Австралії, що відповідає стандартам GB, ISO, ANSI, JIS, DIN та BS.
Сертифіковано за стандартом ISO 9001
4+ млн шт./рік
Здатний до роботи з OEM
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