Related Resources: belt design

Synchronous Timing Belt Pulley Table per ANSI / RMA IP-24

Belt Drive Design and Engineering
Mechanical Gear Design and Engineering

Synchronous Timing Belt Pulley and Flange Dimensions Table per ANSI / RMA IP-24, ISO 5299 and IS 9804.

Synchronous timing gears are used with toothed timing belts to transmit rotary or linear motion. Timing gears and belts are commonly used with stepper motors for precision driven movement. The principle benefit is the ability to separate the motor and load without needing rigid complex gear trains. Timing gear-belt chains can be low-backlash, and are tolerant of shaft misalignment and mechanical imprecision.

Flanged Timing Belt Pulley	UnFlanged Timing Belt Pulley
Synchronous Timing Belt Pulley Flange Dimensions

All dimensions are given in inch units

Belt	Standard Nominal Pulley Width	Standard Pulley Width Designation	Minimum Pulley Width		Flange
			Flanged bf	Unflanged b′ f	Thickness (min)	Height (min)
MXL	0.25	025	0.28	0.35	0.023	0.020
XL	0.38	037	0.41	0.48	0.029	0.040
L	0.50	050	0.55	0.67	0.050	0.065
	0.75	075	0.80	0.92
	1.00	100	1.05	1.17
H	1.00	100	1.05	1.23	0.050	0.080
	1.50	150	1.55	1.73
	2.00	200	2.08	2.26
	3.00	300	3.11	3.29
XH	2.00	200	2.23	2.46	0.098	0.190
	3.00	300	3.30	3.50
	4.00	400	4.36	4.59
XXH	2.00	200	2.23	2.52	0.127	0.245
	3.00	300	3.30	3.59
	4.00	400	4.36	4.65
	5.00	500	5.42	5.72

References:

Machinery's Handbook, 29th Edition
ANSI / RMA IP-24
ISO 5299
S 9804