Material | Plastic Ball Bearings all Made in Japan Kashima Bearings, Inc. Japan

Material

Kashima Bearings, Inc. offers 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.
See below for the characteristics of each material. Please contact us for free consultation for those of you who wish to ensure you are ordering the perfect material for your environment and needs.

Materials for Kashima Bearings

Phenol   PTFE   UHMW (PE)   PP
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

Applicability of Rings and Cages by Material and Environment

◎ Highly Recommended  ○ Recommended
△ Not Recommended  × 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 ◎ ◎ ◎ ◎ ○ × ◎ ◎ ◎ ◎
SDK ◎ ◎ ◎ ◎ ○ × ◎ ◎ × ×
SDHG ◎ △ △ × ○ × ○ ◎ × ×
PTFE PT ◎ ◎ ◎ ◎ ◎ ◎ ◎ ◎ ◎ ×
PTG ◎ ◎ ◎ ◎ ◎ × ◎ ◎ ◎ ◎
PTE ◎ ◎ ◎ ◎ ◎ ◎ ◎ ◎ ◎ ◎
PTN ◎ ◎ ◎ ◎ ◎ ◎ ◎ ◎ ◎ ◎
UHMW PE ○ ○ ◎ × ◎ ◎ ◎ ◎ ◎ ◎
PP PP △ ○ ○ △ ○ ○ ○ ○ ◎ ◎
PEEK PK ○ ○ ○ ○ ◎ ◎ ◎ ◎ ◎ ◎
PKG ◎ ○ ○ ◎ ◎ ◎ ◎ ◎ ◎ ×
PPS PS ○ ◎ ◎ ◎ ◎ ◎ ◎ ◎ ◎ ◎
PSG ◎ ◎ ◎ ◎ ◎ ◎ ◎ ◎ ◎ ×
PCTFE PCT ○ ○ ○ ◎ ◎ ◎ ○ ○ ◎ ◎
PVDF PV ○ ○ ○ ◎ ◎ ◎ ○ ○ ◎ ◎
Carbon
(Graphite)		 CY ◎ ○ ○ ◎ ◎ ◎ ◎ ◎ ○ ×

NOTE: Please contact us for chemical type, concentration, etc.

Temperature Resistance of Materials

☆ Best Recommended  ◎ Highly Recommended  ○ Recommended 
△ Not Recommended  × Do Not Use

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

NOTE: The bearings may be deformed due to high temperatures. 

Applicability of Balls by Material and Environment

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) Properties vary by plastic material.

For more information about tolerances and other issues, download a catalogue from here.

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