Oil Free Polymer Bearings

Technical specifications

Properties	Test Method	Units	Oil Free Polymer Grades
			P-2	P-7	P-8	P-10	P-14	P-15	P-17	P-18	P-23	P-25
Specific gravity	ASTM D 1457	g/cm^3	2.10-2.17	2.03-2.11	3.26-3.29	2.04-2.11	3.78-3.85	1.95-2.01	2.08-2.10	1.85-1.95	2.13-2.18	2.02-2.08
Shore D hardness	ASTM D 2240	-	55-65	55-65	55-70	60-70	55-70	60-67	60-70	55-70	55-64	60-67
Tensile Strength	ASTM D 1457	N/mm^2	14-18	20-25	10-16	11-14	12-16	13-16	6-12	9-12	10-15	15-20
Elongation and break	ASTM D 1457	%	250.300	200-300	125-150	80-100	60-110	180-200	20-80	50-100	150-200	200-250
Compressive strength at 1% deformation	ASTM D 695	N/mm^2	-	-	8-9	9-11	10-11	6-9	10-13	7-10	7-10	7-10
Deformation under load at + 23^0C	ASTM D 621	%	8-13	8-14	7-9	7-8	5-8	8-13	2-3	4-6	8-9	11-13
Residual deformation after 24 hours	ASTM D 621	%		7-9	4-6	4-5	3-6	4-8	1-1.5	2.3	4-5	6-8
Coefficient of linear thermal expansion	ASTM D 686	1/K.10^5	7.10	8-15	6-8	8-11	9-11	8-11	7-10	8-10	8-13	9-12
Dry coefficient of friction*	ASTM D 3702	-
Static			0.05-0.15	0.05-0.15	0.08-0.20	0.06-0.18	0.08-0.20	0.05-0.15	0.08-0.18	0.05-0.15	0.05-0.15	0.05-0.15
Dynamic			0.10-0.20	0.10-.020	0.15-0.20	0.10-0.20	0.15-0.28	0.10-0.20	0.15-0.25	0.10-0.20	0.10-0.20	0.10-0.20

	Units	Oil Free Polymer types
		P-2, P-8	P-7,P-10	P-14	P-17	P-15, P-18, P-13, P-25	Tape bearings
Temperature range	^0C	-260 + 280	-260 + 280	-260 + 280	-260 + 280	-260 + 280	-260 + 280
Maximum "pv" value for continuous use	N/mm^2.m/s	0.7	0.7	0.7	0.7	0.55	1.7
Maximum "pv" value for short time use	N/mm^2.m/s	1.7	1.7	1.7	1.7	1.25	2
Maximum "p" value for continuous use	N/mm^2	7-15	7-15	7-15	10-20	5-10	10-20
Maximum "v" value for continuous use	m/s	2	2	2	2	2	2
Recommended finish grade for the counter-surface	Ra	0.2-0.6	0.2-0.4	0.2-0.6	0.2-0.6	0.2-0.4	0.2-0.6
Material of the counter-surface	-	Carbon steel	Carbon steel Stainless steel	Carbon steel	Carbon steel	Stainless steel Aluminum Brass	Carbon steel
Minimum hardness of the counter-surface	-	HRC 35	HRB 85	HRC 35	HRC 35	HRB 80	HRC 35

Dry operating in normalized conditions:

+23 ⁰C, 50% of relative humidity

POLY FLUORO LTD.

260A. Bommasandra Industrial Area, Hosur Road, Bangalore – 560 099

(: 91-80-27832627. Fax: 91-80-27832549. Mail: sales@polyfluoroltd.com; www.polyfluoroltd.com

Note: This Information is based on our experience to date and believed to be reliable. It is intended only as a guide for use at your discretion. We cannot guarantee favourable results and assume no liability for use of this product. A local test programme is always recommended.