Round Cord Cross Sectional Sizes

Round Cord Cross Sectional Sizes with Round Belt Minimum Lengths and Minimum Inside Diameters

Cross Section of Cord		Minimum Belt Lengths						Minimum Belt I.D.
Cross Section of Cord		For 83A Durometer Materials		For 70A Durometer Material		For 92A Durometer Materials		For 83A Durometer Materials		For 70A Durometer Material		For 92A Durometer Materials
Inches	MM	Inches	MM	Inches	MM	Inches	MM	Inches	MM	Inches	MM	Inches	MM
.062	-	3.75	95.25	3.75	95.25	3.75	95.25	1.132	28.744	1.132	28.744	1.132	28.744
.070	-	3.75	95.25	3.75	95.25	3.75	95.25	1.124	28.541	1.124	28.541	1.124	28.541
.078	2	3.75	95.25	3.75	95.25	3.75	95.25	1.116	28.338	1.116	28.338	1.116	28.338
.093	-	3.75	95.25	3.75	95.25	3.75	95.25	1.101	27.957	1.101	27.957	1.101	27.957
.100	2.5	3.75	95.25	3.75	95.25	3.75	95.25	1.094	27.779	1.094	27.779	1.094	27.779
.103	-	3.75	95.25	3.75	95.25	3.75	95.25	1.091	27.703	1.091	27.703	1.091	27.703
.118	3	3.75	95.25	3.75	95.25	3.75	95.25	1.076	27.332	1.076	27.332	1.076	27.332
.125	-	3.75	95.25	3.75	95.25	3.75	95.25	1.069	27.144	1.069	27.144	1.069	27.144
.139	-	3.75	95.25	3.75	95.25	3.75	95.25	1.055	26.788	1.055	26.788	1.055	26.788
.157	4	4.00	101.60	4.00	101.60	4.00	101.60	1.116	28.353	1.116	28.353	1.116	28.353
.187	4.75	4.50	114.30	4.5	114.30	4.5	114.30	1.245	31.633	1.245	31.633	1.245	31.633
.197	5	4.50	114.30	4.50	114.30	4.75	120.650	1.235	31.379	1.235	31.379	1.315	33.400
.210	-	4.75	120.65	4.75	120.65	4.75	120.65	1.302	33.070	1.302	33.070	1.302	33.070
.218	5.5	4.75	120.65	4.75	120.65	4.75	120.65	1.294	32.867	1.294	32.867	1.294	32.867
.236	6	5.00	127.00	5.00	127.00	5.00	127.00	1.356	34.431	1.356	34.431	1.356	34.431
.250	-	5.00	127.00	5.00	127.00	5.00	127.00	1.342	34.075	1.342	34.075	1.342	34.075
.274	7	5.50	139.70	5.50	139.70	5.75	146.05	1.477	37.508	1.477	37.508	1.556	39.530
.312	8	6.00	152.40	6.00	152.40	6.00	152.40	1.598	40.586	1.598	40.586	1.598	40.586
.375	-	7.50	190.50	7.50	190.50	7.50	190.50	2.012	51.113	2.012	51.113	2.012	51.113
.437	11	8.50	215.90	8.50	215.90	8.50	215.90	2.269	57.623	2.269	57.623	2.269	57.623
.500	-	9.25	234.95	9.25	234.95	9.50	241.30	2.444	6.087	2.444	6.087	2.524	64.108
.562	-	12.00	304.80	12.00	304.80	13.50	342.90	3.258	82.746	3.258	82.746	3.735	94.874

Minimum Pulley Diameter Recommendations

Belt Cross Section	83A	92A
.139" and smaller	.375"	.500"
.156"	.500"	.750"
.187" & .197""	1.00"	1.250"
.218"	1.250"	1.500"
.236"	1.250"	1.750"
.250"	1.500"	2.250"
.312"	2.000"	3.000"
.500"	3.000"	4.000"

Ambient Operating Temperature Limits Are -10° to +150° F (-23.3° to +65.6° C)

Pyrathane® materials will operate in temperatures below -10° F (-23.3° C); however, if allowed to rest, they take a set which is difficult to overcome and may indeed cause fracturing upon start up.

For applications with an ambient temperature outside of the above range, Pyramid Inc. has other Pyrathane® compounds which may be more suitable than those listed here.

We also have materials available that are specifically designed for outdoor use or for environments with ultraviolet light exposure or for applications where static dissipation is desirable.