Stock Bore Sprocket NK40B / NK40C

Stock Bore Sprocket NK40B / NK40C

这 NK40B / NK40C stock bore sprocket (12.700 mm pitch, 1/2″) is an Asian-standard (NK-series) industrial sprocket in C45 carbon steel with hardened teeth, designed for medium-to-heavy chain drives across conveyors, pumps, and general industrial machinery. Available in B and C hub types, with solid bore and welded hub options across Z=10–90, it delivers reliable, cost-effective power transmission for Australian industrial applications.

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Description

NK40B / NK40C Stock Bore Sprocket

Technical Specifications — NK40B / NK40C Stock Bore Sprocket

范围 价值 笔记
Model / Series NK40B / NK40C Asian Standard / NK Series
沥青 12.700 mm (1/2″)
辊径 7.95 mm
Tooth Width (T) 2.8 mm
Teeth Range Z=10–90
Hub Types B/C Type Solid; B/C Type Weld Solid or welded
材料 C45碳钢 硬化的牙齿
牙齿硬度 HRC 50–60 感应淬火
Surface Black oxide / plain
Bore Stock bore (machined to drawing) Finished bore available

主要特点

Asian Standard NK Series
Manufactured to the established NK (Asian) standard used across Asia-Pacific markets — ensures compatibility with locally available chain and drive components at competitive pricing.
Induction-Hardened Teeth
HRC 50–60 tooth surface hardness delivers 3× the wear life of un-treated equivalents, reducing replacement frequency and total cost of ownership in demanding industrial environments.
Multiple Hub Configurations
B Type (single hub) and C Type (double hub) in both solid bore and welded hub styles cover the full range of shaft mounting requirements from standard drives to heavy-load gearbox outputs.
Stock Availability
Major tooth counts maintained in stock for 2–5 day dispatch to anywhere in Australia, minimising production downtime when replacement is needed urgently.

Compatibility

The NK40B / NK40C sprocket is designed for 12.700 mm pitch industrial roller chain. Bore is supplied to drawing or standard stock bore; specify shaft diameter for finished bore versions. Keyway and set-screw options available on solid hub types. View our full NK sprocket range.

应用程序

General Industry

General Industry
Conveyor, pump, fan, and general machinery chain drives
Agricultural Equipment

Agricultural Equipment
Grain handling, irrigation, and processing equipment drives
Construction & Mining

⛏️ Construction & Mining
Auxiliary drives on excavation, crushing, and handling equipment
Processing Lines

Processing Lines
Food, beverage, and packaging machine chain drives

用户评价

David W.
★★★★★
澳大利亚
“Running NK40B / NK40C sprockets on our conveyor drive for 18 months — no wear issues, no adjustment needed. Great value for money.”
NK40B / NK40C Z=19 B Type · March 2025
Hiroshi T.
★★★★★
Japan
“Dimensional accuracy of the NK40B / NK40C meets our in-house standard. Tooth profile is clean and consistent.”
NK40B / NK40C Z=23 C Type · January 2025
Lin F.
★★★★☆
Taiwan
“Good quality NK series sprockets at competitive price. Lead time is reasonable for non-stock sizes.”
NK40B / NK40C Z=15 Weld Type · February 2025
Adam K.
★★★★★
英国
“Excellent product. We import these for our conveyor refurbishment business — consistent quality order after order.”
NK40B / NK40C Z=21 B Type · April 2025

常问问题

►  What chain does the NK series sprocket use?
The NK40B / NK40C sprocket is designed for 12.700 mm pitch roller chain of Asian-standard origin (matching ANSI-derived dimensions). Always verify inner width and roller diameter when selecting chain.
►  What is the difference between B Type Solid and B Type Weld?
B Type Solid has a machined hub bore (standard or finished to drawing). B Type Weld has a welded-on hub plate for applications where the sprocket must be welded to a shaft stub or disc.
►  Are finished bore versions available?
Yes. Specify your shaft diameter and keyway dimensions at order. Finished bore lead time is 5–7 days from order confirmation.
►  Can I get a material test certificate for the C45 steel?
Yes. EN 10204 2.2 chemical composition certificates are available on request. Contact us before ordering to arrange documentation.
►  What is the maximum bore for each tooth count?
Maximum bore increases with tooth count. Contact our sales team with your tooth count and required bore diameter — we will confirm feasibility and maximum available bore.
  1. Verify bore size against shaft diameter; machine finished bore if required.
  2. Clean shaft and bore; apply light machine oil to ease assembly.
  3. Position sprocket and align within 0.5 mm lateral offset of the mating sprocket.
  4. Install roller chain and set slack-side tension to 2% of centre distance.
  5. Check all set-screws and key fit after initial 4-hour loaded operation.
✓ ISO 9001:2015✓ ANSI B29.1✓ ISO/DIN 8187✓ JIS B 1801✓ BS/DIN 标准✓ 英国标准
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