Custom Internal Spur Gear with Gear Milling and Hobbing for High-Efficiency

MOQ： 2 Sets
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Payment Terms	L/C, T/T
Supply Ability	500 Sets/Month
Delivery Time	35 Days
Packaging Details	Plywood Crate
Type	Cylindrical Gear
Gear Profile	Internal Gear
Manufacturing Method	Machining/Gear Shaping
Heat Treatment	Quenching & Tempering
Material	Steel
Production Time	35 Days
Brand Name	YIZGEAR
Place of Origin	CHINA

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Product Details
Company Details

Product Specification


Payment Terms	L/C, T/T	Supply Ability	500 Sets/Month
Delivery Time	35 Days	Packaging Details	Plywood Crate
Type	Cylindrical Gear	Gear Profile	Internal Gear
Manufacturing Method	Machining/Gear Shaping	Heat Treatment	Quenching & Tempering
Material	Steel	Production Time	35 Days
Brand Name	YIZGEAR	Place of Origin	CHINA
High Light	Custom internal spur gear milling ，High-efficiency internal spur gear ，Internal spur gear hobbing

1) Features of Internal Spur Gear

Unlike external gears requiring external space, internal gears feature teeth distributed along the inner wall of a bore, enabling a coaxial layout for input and output shafts. This structure allows it to inherently “enclose” other components.
It offers exceptionally high structural integration, incorporating functions such as bearings and housing walls into the gear itself, significantly reducing component count and system axial length.

2) Functions of Internal Spur Gear

Its core function is to form the central external framework (ring gear) of planetary gear transmissions. In this capacity, it remains stationary or rotates slowly, achieving substantial reduction ratios and power distribution through meshing with planetary gears – a feat difficult for externally meshed gears to accomplish efficiently.
Within more complex differential systems or power-split devices, internal gears serve as pivotal nodes for motion synthesis or decomposition, simultaneously receiving or transmitting two distinct motions.

3) Applications of Internal Spur Gear

Widely employed in the steering mechanisms of tracked vehicles such as tanks and excavators, its concentric design perfectly accommodates the dual-side power input and final output layout requirements, being pivotal to achieving precise and smooth steering.
Within the pan-and-tilt propeller units of marine propulsion systems, the internal gear serves as the core component for enabling 360-degree steering transmission. Its compact structure is of paramount importance for submerged equipment.

Technical Specifications

Parameter	Specification
Custom Made	Available
Gear Profile Type	Cylindrical Gear
Manufacturing Process	Gear Milling & Gear Teeth Hobbing
Teeth Grinding	Included
Module (M)	0.5-25
Number of Teeth (Z)	Custom
Pressure Angle (α)	Custom
Lead Angle	Custom
Accuracy Grade	ISO 8-9 Grade
Heat Treatment	Nitriding
Surface Hardness	650HV

Steel Code Grades Comparison

CHINA/GB	ISO	ГΟСТ	ASTM	JIS	DIN
45	C45E4	45	1045	S45C	CK45
40Cr	41Cr4	40X	5140	SCr440	41Cr4
20CrMo	18CrMo4	20ХМ	4118	SCM22	25CrMo4
42CrMo	42CrMo4	38XM	4140	SCM440	42CrMo4
20CrMnTi		18XГT		SMK22
20Cr2Ni4		20X2H4A
20CrNiMo	20CrNiMo2	20XHM	8720	SNCM220	21NiCrMo2
40CrNiMoA		40XH2MA/40XHMA	4340	SNCM439	40NiCrMo6/36NiCrMo4
20CrNi2Mo	20NiCrMo7	20XH2MA	4320	SNCM420

4 Module Internal Tooth Annular Gears For Slewing Bearing 0

Company Details

Bronze Gleitlager

Bronze Sleeve Bushings

and

Graphite Plugged Bushings

from Quality China Factory



Business Type:

Manufacturer,Exporter 


Year Established:

2016 


Total Annual:

1.0 Million-1.5 Millon


Employee Number:

50~200 


Ecer Certification：

Verified Supplier 

YIZHI MACHINERY which is equipped with a full range of machining capabilities to satisfy customer needs. Our team has extensive experience in precision gearing systems for numerous industries. We have supplied gears for mining equipment, power tools, hydraulic pumps and the rail transit industry.... YIZHI MACHINERY which is equipped with a full range of machining capabilities to satisfy customer needs. Our team has extensive experience in precision gearing systems for numerous industries. We have supplied gears for mining equipment, power tools, hydraulic pumps and the rail transit industry....

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Reach Us
Henan Yizhi Machinery Co., Ltd
Taihong 19# South SongShan Road, Erqi Distict, Zhengzhou, China.
https://www.transmissions-gears.com/

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