Should I specify hardened teeth for all sprockets?

Not necessarily. Hardened teeth (usually induction hardened) are recommended for sprockets with fewer than 25 teeth, or those operating in high-speed, abrasive, or heavily loaded environments. Larger driven sprockets often do not require hardening, saving on production costs.

What is the difference between ANSI and DIN sprockets?

ANSI sprockets are designed for imperial roller chains (measured in fractions of an inch), while DIN/ISO sprockets are designed for metric chains. The tooth profiles and pitch dimensions are different, and they are not interchangeable.

Why is my sprocket shipment experiencing rust upon arrival?

This is usually due to inadequate surface treatment or poor export packaging. Standard sprockets should be treated with a rust-preventative oil and sealed in VCI (Volatile Corrosion Inhibitor) bags before crating. Black oxide offers minimal rust protection on its own.

Can factories accommodate custom splined bores?

Yes, capable manufacturers can broach or wire-EDM custom splines, keyways, or D-bores. This will typically increase the unit cost and may require a higher MOQ to justify the setup time.

Sprockets

Source industrial-grade sprockets from vetted manufacturers and reliable factory partners. Designed for importers, wholesale distributors, and equipment brands seeking bulk pricing or custom OEM production for power transmission systems.

Consultation Gratuite

Steel Roller Chain Sprocket 40 Teeth 1/2 Inch Pitch

This steel roller chain sprocket features 40 teeth and is designed for use with ANSI No. 40 roller chains. It has a 1/2" pitch and is suitable for single-strand chain configurations.

Voir le produit →

15 Tooth 12B Duplex Taper Sprocket for Roller Chains

This 15-tooth duplex taper sprocket is designed for use with 12B series roller chains. It features hardened teeth for enhanced durability and reliable power transmission in demanding industrial environments.

Voir le produit →

ANSI 60 Type A Roller Chain Sprocket

This ANSI 60 Type A roller chain sprocket is designed for optimal power transmission. Featuring hardened teeth and robust construction, it offers long-lasting service and efficient operation.

Voir le produit →

19 Tooth Double Pitch Sprocket C2060H

This is a C2060H 19 tooth double pitch sprocket. It is designed for efficient power transmission.

Voir le produit →

Triplex Sprocket 12 B-3 Z=57

This is a triplex sprocket designed for chain size 3/4" x 7/16" and chain type 12 B-3. It features 57 teeth and is suitable for heavy-duty applications.

Voir le produit →

D60B52 Double Type B Sprocket

This double sprocket is a type B with 52 teeth and a 3/4 inch pitch. It is designed for efficient power transmission in industrial applications.

Voir le produit →

26-Tooth Roller Sprocket for C2080/A2080 Chain

This roller sprocket is designed for use with C2080/A2080 chain, featuring a 2-inch pitch. It has 26 teeth and is suitable for various power transmission applications.

Voir le produit →

D140B20 Stock Bore Sprocket

This D140B20 sprocket features a stock bore for secure mounting. With 20 teeth and a 12.1" outside diameter, it is suitable for various power transmission applications.

Voir le produit →

Double Strand Sprocket with 1/2 inch Pitch

This double sprocket features a 1/2" pitch and a plain stock bore. The sprocket is designed for use with roller chains and provides efficient power transmission.

Voir le produit →

Steel Stock Bore Sprocket with 21 Teeth

This steel stock bore sprocket is designed with 21 teeth for efficient power transfer. It is compatible with 100/1.25" chains and features a B style configuration.

Voir le produit →

Double Strand Sprocket with 1/2" Pitch and Plain Bore

This is a double strand sprocket with a 1/2" pitch. It features a plain stock bore and is designed for use with a number 40 chain.

Voir le produit →

Double Strand Sprocket 120-2B, 1.5 inch Pitch, 13 Tooth

Double strand sprocket 120-2B has a 1.5" pitch and 13 teeth. It is suitable for use with corresponding 120-2 chains in various machinery and equipment.

Voir le produit →

20-Tooth Sprocket for #40 Roller Chain

This 20-tooth sprocket is designed for use with #40 roller chain. It features a 5/8" bore and A plate design for power transmission applications.

Voir le produit →

20-Tooth Sprocket for #80 Chain

This sprocket is designed for use with #80 chains. It features 20 teeth for efficient power transmission.

Voir le produit →

60BS32 Roller Chain Sprocket with 1 5/16 inch Bore

This is a 60BS32 roller chain sprocket with a 1 5/16 inch bore. The Type B hub sprocket is designed for efficient power transmission in various mechanical systems.

Voir le produit →

21-Tooth Sprocket for 2062 Chain

This sprocket is designed for use with 2062 chains and features 21 teeth. It has a 1 15/16" bore with a key way for secure installation.

Voir le produit →

80A30 Type A Roller Chain Sprocket

This is a single Type A sprocket with 30 teeth, designed for use with #80 roller chain. Its precision machining ensures accurate tooth profile and smooth chain engagement for efficient power transmission.

Voir le produit →

20-Tooth Chain Sprocket

This chain sprocket is designed with 20 teeth for optimal chain engagement. It is constructed from high-quality materials to ensure durability and reliable power transmission.

Voir le produit →

Sourcing sprockets in volume requires strict attention to dimensional accuracy, material composition, and heat treatment. A sprocket is only as reliable as its tooth profile and bore tolerance; minor deviations in pitch diameter or inadequate hardening lead to premature chain wear, vibration, and system failure. When buying direct from overseas manufacturers, verifying their machining capabilities and quality control processes is the difference between a reliable power transmission component and a costly maintenance liability.

Critical Specifications for Production Orders

When specifying sprockets for bulk manufacturing or custom production, standard designations (like ANSI or DIN/ISO) only cover the baseline geometry. You must define exact parameters for the factory to ensure compatibility and longevity.

Standard Compliance: Specify whether the sprockets must adhere to ANSI (American National Standards Institute) B29.1 or DIN 8187/ISO 606 standards. Mixing metric and imperial chain standards will cause immediate binding.
Material Selection: The industry standard is C45 (AISI 1045) medium carbon steel for standard industrial applications. For corrosive environments, 304 or 316 stainless steel is required. Cast iron (GG25) is often used for large diameter, low-speed sprockets to reduce weight and cost.
Hub Configuration: Clearly define the hub type: Type A (flat, no hub), Type B (hub on one side), or Type C (hub on both sides).

Bore Type	Typical Application	Sourcing Consideration
Pilot Bore (Rough Stock)	Distributors holding inventory for custom machining	Lowest unit cost; requires secondary machining by the end-user.
Finished Bore (with Keyway/Setscrew)	OEM equipment assembly lines	Requires precise tolerance specifications (e.g., H7 bore tolerance).
Taper Bored	High-torque applications requiring quick installation	Must match specific taper bush standards (e.g., 1610, 2517).

Need help verifying a manufacturer's machining capabilities? We connect buyers with vetted factories equipped for high-precision power transmission components.

Discuss your specifications

Manufacturing Tolerances and Heat Treatment

The longevity of a sprocket is largely determined on the factory floor during the gear hobbing and heat treatment stages. Many lower-tier suppliers skip critical finishing steps to reduce costs.

Blank Machining

The initial steel blank is turned on a CNC lathe. Concentricity between the bore and the outside diameter is established here. High runout at this stage cannot be corrected later.

Tooth Hobbing

The tooth profile is cut. Precision hobbing machines ensure the pitch diameter perfectly matches the chain. Worn tooling at the factory leads to poor tooth profiles.

Induction Hardening

Critical for wear resistance. Only the teeth should be hardened (typically to HRC 45-50), leaving the core and hub ductile to absorb shock loads.

Surface Finishing

Options include black oxide (standard corrosion resistance), zinc plating, or electrophoretic deposition (EPD) for harsh environments.

When evaluating a new supplier, it is highly recommended to conduct factory audits to verify their in-house heat treatment capabilities. Factories outsourcing their induction hardening often struggle with consistency, leading to batches with brittle teeth that snap under load.

Essential Quality Control Checks

Before shipment, rigorous quality control & inspection is necessary. Ensure your inspection plan covers:

Hardness testing on the tooth flank (verify HRC levels and depth of case hardening).
Runout measurement (radial and axial) to ensure concentricity and prevent chain vibration.
Bore tolerance verification using Go/No-Go gauges.
Surface finish inspection for uniform coating and absence of machining burrs.

Sourcing Mechanics: MOQs, Lead Times, and Pricing

Pricing for standard sprockets is heavily tied to raw material costs (steel) and order volume. Custom sprockets require new tooling or dedicated CNC programming, which impacts both lead time and minimum order quantities.

30-45 Days

Typical Production Lead Time

For standard catalog sprockets. Custom OEM designs may add 15-20 days.

500-1,000

Standard MOQ (Pieces)

Varies by sprocket size; large cast iron sprockets may have MOQs as low as 50.

HRC 45-50

Target Tooth Hardness

Standard induction hardening range for C45 steel sprockets.

If you are developing proprietary equipment, utilizing specialized OEM/ODM services ensures your custom tooth profiles, specialized bore splines, or lightening holes are manufactured exactly to your engineering drawings.

Looking to consolidate your power transmission supply chain? Talk to our team about securing reliable volume production and managing logistics.

Get a sourcing quote

Frequently Asked Questions

Successfully sourcing sprockets at scale means looking past the unit price and scrutinizing the factory's machining tolerances and heat treatment consistency. By establishing strict technical specifications and enforcing pre-shipment inspections, you can secure durable power transmission components that keep your customers' operations running smoothly.

Get Sourcing Help for Sprockets

Tell us your requirements and our experts will connect you with verified manufacturers.