Characteristics of Plastic Bearings (rings, cages, balls), Categorized by Material

Uniquely Kashima

Kashima Bearings, Inc. manufactures and sells high-quality bearings made from 7 kinds of plastic, 5 of which injection-molding companies cannot use. Plus, we can craft a huge range of shapes, sizes and types in all of our materials.

Based on decades of expertise and know-how, we offer the optimum combination of bearing type and materials that take advantage of the unique characteristics of each to match your environment and conditions for maximum effectiveness and cost-savings.

Free consultation for those of you who wish to ensure you are ordering the perfect material for your environment and needs.

This page provides basic data about the characteristics of each material.
Note: Please consult us about the details of the physical properties of each material. Contact Us

(See tables below.)

Materials for Kashima bearings

Phenol   PTFE   UHMW(PE)   P.P
Phenol   PTFE   UHMW (PE)   PP
PEEK   PPS   PCTFE   Carbon
PEEK   PPS   PCTFE   Carbon
Other types of plastics            
Other types of plastics            

Bearing Number

[Inner and outer ring material] - [Ball material]

Ex. UKB 6002 PT - A

Suitability of rings and cages by material and use

Degree of Recommendation:
Highly Recommended, Recommended,
Discouraged, × Do Not Use

Material Call
symbol
Dry Irregular
moisture
In water /
In sea-water
Vapor Chemical Non-
magnetic
Insulating
Acid Alkali Organic
solvent
Oil
Phenol SD ×
SDA × × ×
SDHG × × × ×
PTFE PT ×
PTG ×
PTE
PTN
UHMW PE ×
PP PP
PEEK PK
PKG ×
PPS PS
PSG ×
PCTFE PCT
PVDF PV
Carbon
(Graphite)
CY ×

NOTE: For chemicals, please consult us regarding the type and concentration, etc. of such.

Temperature Resistance of Phenol

Very Highly Recommended, Highly Recommended, Recommended,
Discouraged, × Do Not Use

Material Call
symbol
Temperature
-190℃~ -100℃~ -50℃~ -20℃~ Room
temperature
~60℃
~120℃ ~200℃ ~350℃
Phenol SD × × × ×
SDA × × × ×
PTFE PT ×
PTG ×
PTE ×
UHMW PE × × × ×
PP PP × × ×
PEEK PK × × ×
PKG × × ×
PPS PS × × × ×
PSG × × × ×
PCTFE PCT × × × ×
Carbon
(Graphite)
CY × ×
(Note)

NOTE: the shape of the bearing will change due to such temperatures.

Suitability of balls by material and use

Ceramics   Stainless   Soda glass   Plastics
Ceramic   Stainless steel   Soda glass   Plastics
Ball Material Name
Reference Code
Dry
Water
Chemical-
resistant
Non-
magnetic
Insulating
Steam
Ceramic
Al2O3
A
*1
ZrO2
Z
Si3N4
N
SiC
C
Stainless steel
SUS304
S
SUS316
S6
Soda glass
G
Plastic
PP
PP
*1
*2
PE
PE
PVDF
PV
PTFE
PTN
PEEK
PK

Recommendation: indicates the best materials. indicates the second-best materials. indicates good materials. indicates materials that can be used but are not recommended. The shape indicates materials that cannot be used.
*1) Please fill out and send the Contact Form.
*2) Property depends on material.

 

Please download a catalogue (top-left button) to learn more about tolerances and other issues.

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