Wear factor (K) is an indication of a materials resistance to wear as a function of the volume of material lost, force (load) and velocity at the wear interface and time. It is often determined using a “thrust washer” wear testing apparatus per ASTM D3702 in which a molded plastic specimen is rotated against a substrate thrust washer under set pressure and velocity conditions.

A wear factor is calculated with the equation W=K*F*V*T. In this equation W is wear volume (in3), K is wear factor (in3 min/ft lb hr)10-10, F is force (lb), V is velocity (ft/min), and T is elapsed time (hr).

A material with a lower wear factor (K) has greater resistance to wear and these values are useful for material comparison purposes.

[ View wear data in metric units | Return to wear data resin system list ]

Plastic vs Plastic

Test Conditions

PV 1000

Load 4

Speed 50

Rotating Sample vs Stationary Sample µ
Dynamic
RTP Product Wear

Factor

RTP Product Wear

Factor

PC

Unfilled

1256 vs

PA 6/6

Unfilled

616 0.64

PC

Unfilled

6797 vs

PA 6/6

30% Glass Fiber

285 0.39

PC

30% Glass Fiber

3147 vs

PC

30% Glass Fiber

865 0.31

PC

30% Glass Fiber

129 vs

PA 6/6

30% Glass Fiber

15% PTFE

356 0.29

PC

30% Glass Fiber

15% PTFE

226 vs

PA 6/6

30% Glass Fiber

15% PTFE

195 0.19

PC

30% Glass Fiber

15% PTFE

809 vs

PC

Unfilled

318 0.28

PC

30% Glass Fiber

15% PTFE

98 vs

PA 6/12

30% Glass Fiber

15% PTFE

173 0.18

PC

30% Glass Fiber

15% PTFE

4 vs

PC

30% Carbon Fiber

15% PTFE

29 0.11

PC

30% Glass Fiber

15% PTFE

413 vs

PBT

30% Glass Fiber

15% PTFE

533 0.11

PC

30% Glass Fiber

15% PTFE

2 vs

PA 6/12

30% Carbon Fiber

15% PTFE

53 0.17

PC

30% Glass Fiber

15% PTFE

1169 vs

PPS

30% Glass Fiber

15% PTFE

285 0.28

PC

30% Glass Fiber

15% PTFE

329 vs

PA 6/6

30% Glass Fiber

246 0.23

PC

15% PTFE

83 vs

PC

15% PTFE

340 0.14

PC

10% Carbon Fiber

15% PTFE

2569 vs

PC

10% Glass Fiber

15% PTFE

129 0.25

PC

10% Carbon Fiber

15% PTFE

1565 vs

PC

10% Carbon Fiber

15% PTFE

101 0.32

PC

10% Carbon Fiber

15% PTFE

11 vs

PA 6/12

30% Carbon Fiber

15% PTFE

2 0.13

PC

10% Carbon Fiber

15% PTFE

14 vs

PA 6/6

30% Carbon Fiber

15% PTFE

15 0.15

PC

10% Carbon Fiber

15% PTFE

108 vs

PA 6/12

30% Glass Fiber

15% PTFE

39 0.16
  • Thrust washer testing conducted per ASTM D 3702
  • Wear Factor units: (in3 min/ft lb hr)10-10
  • PV units: lb ft/in2 min
  • Load units: lbs
  • Speed units: ft/min

Plastic vs Steel

RTP Product RTP Product Tested vs Steel (1018 C)
Test Conditions

PV 2000

Load 8