Need a Large Sprocket?
Industrial Large Sprockets
Custom and standard heavy-duty sprockets for mining, cement, sugar, paper and bulk-handling drives — pitch 1/2″ to 4″, OD up to 2000 mm, single/double/triple strand. Shipped to 46 countries since 2007.
Specification Range
A quick reference for the sprockets we produce in-house. Anything outside these ranges usually still fits our engineered-class process — send the drawing and we will confirm.
| Parameter | Range | Notes |
|---|---|---|
| Chain pitch | 1/2" – 4" (12.7 – 101.6 mm) | ANSI #40 through #320; ISO 08B through 32B |
| Number of teeth | 9 – 200 | Higher tooth counts available on split-hub designs |
| Outside diameter (OD) | Up to 2000 mm | Two-piece / split construction above 1600 mm |
| Strand count | Single / double / triple | Quad on engineered class by request |
| Bore style | Plain, finished, taper, QD, split | Taper Lock 1008 – 4545, QD JA – M |
| Material | 45# / 42CrMo / cast iron / stainless | Mill test certificate supplied on request |
| Heat treatment | Induction-hardened teeth 45–55 HRC | Full through-hardening on engineered class |
| Standards | ANSI B29.1 / ISO 606 / DIN 8187 / JIS B1801 | Customer OEM drawings also welcome |
What we manufacture
Standard, Engineered & Custom Large Sprockets for Heavy Industry
Roller Chain Sprockets
ANSI B29.1 & ISO 606 single, double and triple strand sprockets from #40 through #240. 45# steel or 42CrMo, induction-hardened teeth 45–55 HRC. Stock hubs A, B, C or made to your bore and keyway.
Engineered Class Sprockets
Heavy engineered-class sprockets for mining, cement mills and bulk conveyors — pitches 4″ and above, OD up to 2000 mm. Split-hub designs, weld-on hubs, taper bore and QD bushing options for field-replaceable service.
Custom Drawing Service
Send a PDF, DWG or STEP file and get a same-day feasibility review from our engineering team. We reverse-engineer worn parts from samples, resize for pitch conversions and redraw to your OEM standards.
Sprocket Product Range
A single sourcing point for every sprocket size on the plant floor: standard ANSI and ISO series held to tight tolerance, engineered classes for the drives that matter most, and drawing-based custom work when the catalogue does not fit. Every part is machined in-house in our Hangzhou facility — no sub-contract lathes, no untraced blanks.
- Roller chain sprockets — ANSI 40 through 240, single/double/triple strand
- Engineered-class sprockets — 80H through 240H, hardened teeth
- Taper Lock & QD bushed sprockets — 1008 to 4545, JA to M
- Split-hub & weld-on hub sprockets for mining conveyors
- Idler sprockets, plain or finished bore
- Cast-iron platewheel sprockets, ductile-iron variants
- Stainless-steel sprockets (304 / 316) for corrosive service
- ISO 606, DIN 8187, JIS B1801 metric roller-chain sprockets
- Reverse-engineered replacements from worn sample
“
We had six worn engineered sprockets on an aggregate feeder and only a photo of one nameplate. Ever Power reverse-engineered the tooth profile, cut 42CrMo blanks and delivered in four weeks. Two years on, still turning. — Maintenance Superintendent, aggregate quarry, Chile.
“
We know sprockets
18 Years Engineering Custom Sprockets for OEMs Worldwide
Our engineers came out of the drive-component industry and stayed there. Every quotation is reviewed by a mechanical engineer before it leaves the office, and every finished sprocket carries a heat-lot number traceable to the mill certificate. That is why plants in 46 countries send drawings to Hangzhou rather than shop the catalogue.
Industries We Drive
Where Our Large Sprockets Are Turning Today
Mining & Aggregate
Apron feeders, primary crushers, stackers
Cement & Lime
Kiln drives, clinker conveyors, ID fans
Sugar & Ethanol
Cane carriers, intermediate carriers, bagasse
Bulk Handling
Port loaders, ship unloaders, silo drives
Pulp & Paper
Log haul-ups, chipper feeders, dryer sections
Agricultural OEM
Balers, forage harvesters, seeders, spreaders
Steel & Foundry
Continuous casters, roughing mills, coilers
Recycling
Shredders, trommels, C&D screens
About Ever Power
A Hangzhou Sprocket Foundry Trusted by OEMs in 46 Countries
Hangzhou Ever Power Transmission Parts Co., Ltd. has produced roller-chain and engineered-class large sprockets since 2007. The plant sits on 120,000 m² in the Hangzhou industrial corridor and runs its own forging, gear-hobbing, heat-treatment and CNC-finishing lines under one roof. That vertical setup is why lead times on custom sprockets stay in the two- to four-week range even when quantities are small.
Today we ship to 46 countries — heaviest volumes to North America, Brazil, Germany, Italy, Australia and Southeast Asia. Every quotation is reviewed by a mechanical engineer, and every finished sprocket carries a heat-lot number traceable back to the raw mill certificate. Quality control never leaves our engineers’ desks.
42CrMo & 45# Steel, Fully Traceable
100% Dimensional & Hardness Inspection
Direct Factory Pricing, No Middleman
How we build them
Six Stages, Six Sign-offs
Every large sprocket that leaves Hangzhou passes six documented gates. No sub-contracting, no black boxes — you can trace a finished part back to the ingot.
Free-form Forging
Ingot pre-forged and normalised to grain-refine the blank before machining.
CNC Rough Turning
Bore, OD and hub profile turned on Doosan / Mazak lathes; blank thickness verified.
Tooth Hobbing
Gleason and Chinese-brand hobbing machines cut ANSI/ISO tooth form to AGMA class 8.
Induction Heat Treatment
Tooth flanks quenched to 45–55 HRC; case depth confirmed on witness coupon.
Finish Grinding & Balancing
Bore and keyway ground; large diameters dynamically balanced to G6.3.
Full Inspection & Marking
Coordinate measurement, hardness, PT crack check; heat-lot number laser-etched.
