PRODUCT INFO

Worm Gear

A worm gear set consists of a screw-like worm meshing with a toothed worm wheel. The geometry allows very high speed-reduction ratios in a single stage and provides self-locking capability — motion can only travel from the worm to the wheel, never the reverse.

CAPACITY

Ø 10 — 3100 mm

MODULE/STANDARD

Mn 0.5 — 25.4

TYPE

DIN / ISO / AGMA

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EVALUATION

Worm Gear advantages and important considerations

Advantages

Compact design with low noise can reach very high reduction ratios. Can transmit much higher torque than other gear types.
Has a self-locking feature — motion travels only from the worm to the wheel. Advantageous for cranes and lifting equipment.
Good mesh performance with smooth and quiet operation.

Important Considerations

Efficiency is lower than other gear types. High friction losses, heat generation, and lubrication requirements.
Expensive to manufacture — requires special materials (e.g. phosphor bronze).
Low power transmission capacity, cannot operate at high speeds.

MANUFACTURING PROCESS

Worm Gear how is it manufactured?

01 / METHOD

Profile Design

Module, number of teeth, pressure angle, profile shift, center distance, speed ratio and power transmission are calculated based on ISO or AGMA standards.

02 / METHOD

Blank Cutting

Turning, milling, forging or casting forms the blank.

03 / METHOD

Tooth Generation

Hobbing, shaping, milling or grinding methods are used.

04 / METHOD

Surface Finishing

Grinding, honing, lapping or shaving improves surface quality.

05 / METHOD

Hardening

Carburizing, nitriding, induction or surface hardening is applied.

06 / METHOD

Inspection & Testing

Dimensional, profile, pitch and runout measurements verify the specification.

TECHNICAL INFO

Worm Gear calculation formulas

Symbol	Name	Formula	Definition
m	Normal Module	m = 1 / DP	A measure of tooth size
α	Reference Pressure Angle	20° veya 25°	Angle of the tooth profile
Z	Number of Teeth	tamsayı	Number of teeth on the gear
a	Center Distance	a = (z1 + z2)m / 2 + x1m + x2m	Distance between the two shafts
i	Speed Ratio	i = n1/n2 = z2/z1	Ratio of angular speeds
P	Power Transmission	P = T × n / 9550	Amount of power transmitted
η	Efficiency	η = i / (i + f × tan λ)	Ratio of output to input power

AREAS OF USE

Worm Gear in which sectors is it used?

Worm gears are widely used in lifting equipment, conveyors, hoists, cranes, ship steering, dividing heads, reducers and automotive lifts, where compact size and high torque are required.

Lifting Equipment

Transport Vehicles

Cranes

Textile Machinery

Ship Steering Mechanisms

Rotary Tables

Dividing Heads

Reduction Gears

Automobiles

Vehicle Lift Shafts

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