Spur & Helical Gears

直齿/斜齿圆柱齿轮

Spur gears and helical gears are the most fundamental types of gears in transmission systems. Gyan Drive produces batch quantities at GB Class 4~5 precision, with grinding capabilities up to DIN Class 3. Spur gears feature simple structure, high efficiency (98~99%), and no axial thrust. Helical gears offer smooth meshing, low noise, and high load capacity — ideal for high-speed, precision transmission applications.

Specifications

Module Range	M0.5 ~ M20
Max Outer Diameter	≤ Φ800mm
Tooth Count Range	18 ~ 200 teeth
Pressure Angle	20° (standard)
Helix Angle	0° ~ 30° (helical)
Precision Grade	Batch GB Class 4~5, grinding up to DIN 3
Common Materials	20CrMnTi, 40Cr, 42CrMo, 45# Steel, Stainless Steel
Heat Treatment	Carburizing 58~62HRC / Quenching & Tempering 241~321HB / Induction Hardening / Nitriding
Process Flow	Hobbing → Heat Treatment → Grinding → Inspection
Applications	Industrial machinery, automation equipment, automotive transmissions, construction machinery

DIN / ISO / AGMA / GB Standards Reference

Standard System	Grade / Scope	Region
DIN 3961~3967	DIN Class 3~7	Germany / Europe
ISO 1328	ISO Class 3~7	International
AGMA 2000-A88 / 2015	AGMA Q11~Q15	North America
GB/T 10095	GB Class 3~7	China
JIS B 1702	JIS Class 0~4	Japan

Manufacturing Processes

Process	Equipment	Capability	Precision
Hobbing	Vertical/Horizontal Gear Hobbing Machine, Gear Shaper	M1~M12, 5 sec/tooth	GB Class 4
Grinding	Worm Wheel & Form Grinding Machines (Import + Domestic)	M1~M10, ≥500mm	DIN Class 3 (Max)
Turning	CNC Machining Center, Lathe, Mill-Turn, Swiss-Type	≥600mm	0.005mm
Grinding (OD/ID)	CNC Grinders, Internal/External/Surface Grinders	≥500mm	0.001mm

Heat Treatment Capabilities

Treatment Type	Materials	Case Depth	Surface Hardness	Post Process
Carburizing & Quenching	20CrMnTi/20CrMo	0.5~3.0mm	58~62HRC	Grinding required
Quenching & Tempering	42CrMo/40Cr/45#	Through	241~321HB	Ready to use
Induction Hardening	40Cr/45#	1.0~5.0mm	48~58HRC	May grind
Nitriding	42CrMo/38CrMoAl	0.1~0.6mm	900~1100HV	Usually no post

Testing & Inspection

CMM (Coordinate Measuring Machine), Gear Measuring Center, Roughness Tester, Hardness Tester (Rockwell/Brinell/Vickers), Gear Rolling Tester, Profile Projector. Full dimensional inspection with tooth profile/lead/pitch report included.

Spur & Helical Gears