|
Plastic Ball
|
Specification
|
Specific Gravity
|
Hardness Shore
|
Normal Condition
|
Max Temp. Resistance o C
|
Water Absorption
|
Cold Resistance
|
Colour
|
|
Polyamide - A
(Nylon-PA)
|
1,13
|
80 (D)
|
100o C
|
120o C
|
3%
|
very good
|
white
|
|
Hostaform-C
(Delrin-POM)
|
1,45
|
80 (D)
|
100o C
|
140o C
|
minimum
|
upto -40o C
|
white
|
|
Teflon
(PTFE)
|
2,10
|
60 (D)
|
260o C
|
300o C
|
absent
|
very good
|
white
|
GRADES & TOLERANCES
|
GRADE
|
Sphericity
|
Tolerance
|
Surface |
|
um.
|
Micro-Inches
|
um.
|
Micro-Inches
|
|
I
|
12.5
|
500
|
+/-12.5
|
+/-500
|
Polished
|
|
II
|
25
|
1000
|
+/-25
|
+/-1000
|
Polished
|
|
III
|
125
|
5000
|
+/-125
|
+/-5000
|
Unpolished
|
These characteristics are given by plastic ball manufacturers. they can differ on the types of production cysle.
|
