Basic Info.

Model NO.	MXL, XL, L, H, XH, XXH, T2.5, T5, T10, etc
Material	Brass
Surface Treatment	Black Coating/Clear Oxidation/Nickel Plated/Zinc
Application	Industry
OEM	Acceptable
Shipping Way	White/Black/Other
Warranty	1 Year
Certificate	RoHS
Hardness	Hardened
Manipulate Way	Semi-Automatic Manipulation
Manufacturing Method	Sintered Gear
Toothed Portion Shape	Spur Gear
Changes Way	Mixed
Type	Circular Gear
Trademark	JBOSUN
Specification	SGS, ROHS
Origin	Shenzhen China
HS Code	84839000

Product Description

H Brass Timing Pulley is a high-performance transmission component designed for high-precision and corrosion-resistant scenarios. It is made of high-quality brass material and precision machining technology, and has excellent mechanical performance and environmental aging resistance. Suitable for fields such as medical equipment, precision instruments, and food processing that require strict hygiene standards, conductivity, or low friction losses, ensuring long-lasting stability and precise synchronization of power transmission.

Timing Pulley
	Type	Belt nominal width	Pulley width	Step/hub	Flange diameter	Flange thickness	Number of tooth(or as blueprint)
T Type	MXL	3.048mm~25.4mm	4mm~27mm	as your request	as standard	1.0mm~3.0mm	15~200
	XL	4.826mm~50.8mm	6mm~52mm			1.0mm~3.0mm	10~200
	L	9.398mm~76.2mm	11mm~79mm			1.5mm~3.0mm	10~200
	H	9.398mm~101.6mm	11mm~105mm			1.0mm~3.0mm	10~200
	XH	19.05mm~127mm	21mm~131mm			1.0mm~3.0mm	18~120
	XXH	25.4mm~152.4mm	29mm~158mm			2.0mm~3.0mm	18~120
	T2.5	3mm-30mm	4mm-32mm			1.0mm~3.0mm	12~200
	T5	4mm~50mm	5mm-52mm			1.0mm~3.0mm	10~300
	T10	10mm~100mm	11mm~102mm			1.5mm~3.0mm	12~200
	T20	20mm~100mm	22mm~103mm			1.5mm~3.0mm	18~120
	AT5	6mm~50mm	7mm~52mm			1.0mm~3.0mm	14~300
	AT10	10mm~100mm	11mm~102mm			1.5mm~3.0mm	12~200
	AT20	20mm~100mm	22mm~103mm			1.5mm~3.0mm	18~120
Arc Type	2M	3mm-30mm	4mm~32mm			1.5mm~3.0mm	15~200
	3M	3mm-30mm	4mm~32mm			1.0mm~3.0mm	12~250
	5M	10mm~50mm	11mm~52mm			1.0mm~3.0mm	14~300
	8M	10mm~85mm	12mm-87mm			1.0mm~3.0mm	16~200
	14M	20mm~115mm	22mm-119mm			1.5mm~3.0mm	18~200
	S2M	3mm-30mm	4mm~32mm			1.0mm~3.0mm	15~200
	S3M	3mm-30mm	4mm~32mm			1.0mm~3.0mm	12~250
	S5M	10mm~50mm	11mm~52mm			1.0mm~3.0mm	14~300
	S8M	10mm~85mm	12mm-87mm			1.5mm~3.0mm	16~200
	2GT	3mm-30mm	4mm~32mm			1.0mm~3.0mm	15~200
	3GT	3mm-30mm	4mm~32mm			1.0mm~3.0mm	12~250
	5GT	10mm~50mm	11mm~52mm			1.0mm~3.0mm	14~300
	8MGT	10mm~85mm	12mm~87mm			1.0mm~3.0mm	10~200

Production process flow

1. Material pretreatment

Brass ingot material selection: H59/H62 grade brass is selected, and its composition is detected by a spectrometer (copper content ≥ 59%, lead content<0.1%).
Hot forging: Heating to 750 ° C for forging, initially forming a wheel blank, eliminating internal pores and increasing density.

2. Precision machining

CNC turning: rough machining of shaft holes and end faces, with a reserved 0.2mm precision machining allowance.
Tooth milling: Use hard alloy cutting tools to perform five axis linked milling of teeth according to the H-shaped tooth profile program, with a tooth surface roughness Ra ≤ 1.6 μ m.
Tooth surface grinding: Diamond grinding wheel is used for precision grinding of the tooth side, ensuring a tooth profile tolerance of ± 0.01mm.

3. Structural optimization

Hollow out of the spoke: By using electric discharge machining (EDM) or laser processing to reduce weight holes, key support structures are retained.
Dynamic balance correction: Add/remove counterweights on the balancing machine to achieve G6.3 level dynamic balance standards.

4. Surface treatment

Chemical passivation: Soaking in chromate solution forms a passivation film, enhancing corrosion resistance.
Selective electroplating: Localized nickel plating is applied to the contact area (such as the shaft hole) with a thickness of 10-15 μ m (salt spray test ≥ 72 hours).

5. Quality inspection

Three coordinate measurement: full tooth profile scanning, verifying that the cumulative error of tooth pitch is less than 0.03mm.
Load test: Simulate actual working conditions (rated torque 120%) and run continuously for 48 hours without abnormal wear.

6. Packaging and Delivery

Vacuum oxidation prevention: Each pulley is independently packaged (filled with nitrogen gas), with material reports and testing certificates attached.
Customized identification: Supports laser marking (brand logo, tooth profile parameters).

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