Timing Belt Chains & Sprockets

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Technical Gear Information

	Timing Belt Chains & Spockets	AMERICAN STANDARD TIMING BELTS

Pulley, Generating Tool
Rack Form Dimensions
for Involute Teeth

Belt Section	Number of Grooves	Pb +0.0001	β 10.25 (deg.)	hr +0.0002 -0.000	bs +0.0002 -0.000	r1 +0.0001	r2 +0.0001	2a
MXL XL L H XI-I XXH	10 thru 23 24 & over 10 & over 10 & over 14 thru 19 over 19 18 & over 18 & over	0.0800 0.0800 0.2000 0.3750 0.5000 0.5000 0.8750 1.2500	56 40 50 40 40 40 40 40	0.025 0.125 0.056 0.084 0.102 0.102 0.271 0.405	0.024 0.0265 0.050 0.122 0.167 0.167 0.299 0.457	0.012 0.012 0.024 0.034 0.058 0.052 0.079 0.106	0.009 0.009 0.024 0.021 0.041 0.056 0.076 0.111	0.020 0.020 0.020 0.030 0.054 0.054 0.110 0.120

		FULL RADIUS TIMING BELT

Rack Form Dimensions**

Belt Section	# of Grooves	Pb	hr	bg	bt	r1	r2	r3	r4	X	2A
8 M	22-27 28-89 90-200	0.31496 0.31496 0.31496	0.1295 0.1422 0.1430	0.1370 0.1640 0.1671	0.2380 0.2381 0.2242	0.1005 0.1092 0.1038	0.045 0.042 0.037	* 0.508 *	0.0000 0.0286 0.0000	0.0000 0.0098 0.0000	0.054 0.054 0.054
14 M	28-36 37-89 90-216	0.55118 0.55118 0.55118	0.2489 0.2440 0.2500	0.2799 0.3043 0.3192	0.4385 0.4248 0.4040	0.1857 0.1836 0.1820	0.074 0.072 0.075	0.820 0.620 0.792	0.0450 0.0450 0.0100	0.0000 0.0000 0.0000	0.110 0.110 0.110

* Blend
** Chart Courtesy- Gates Rubber Co.

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Reprinted from Ash Gear & Supply
Omni Gear and Machine Corporation - 90 Bissel Street - Joliet, Illinois 60432
Toll Free: (800) 876-7216 - Fax: (815) 723-9207