Product
High Precision Si3N4 Silicon Nitride ceramic ball for bearing
- Description:
Company Feature: Stable quality and High consistency
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Tolerances by Grade for Individual Balls Micrometers
GB/T 308-2002Grade(G)
Allowable Ball
Diameter Variation
(VDWl)
Allowable Deviation from Sperical Form
(Rw)
Roughness
(Ra)
3
5
10
20
100
0.13
0.25
0.5
1
5
0.08
0.13
0.25
0.5
2.5
0.010
0.014
0.020
0.032
0.1
Size Range: 0.4mm~140mm
Grade: G5~G60
Company Feature: Stable quality and High consistency
Compared with steel ball, Si3N4 ball has following advantages:
1. 59% lighter than steel ball, which means less centrifugal force and less wear on the groove during high speed and acceleration.
2. 44% larger elastic modulus, which means less deformation under load
3. Harder with Rockwell hardness as 78
4. Smaller friction coefficient
5. Only 1/4 coefficient of thermal expansion of steel, can endure sharp fluctuation of temperature
Size Range: 0.4mm~140mm
6. Superior surface finish can be achieved, Ra could be 4~6 nm
7. Can endure high temperature with high hardness and strength up to 1050°C
8. Never rust, and can roll without lubrication.
9. More corrosion resistant than steel.
10. Free of metal contamination.
11. Non-magnetic
12. Electric isolation
13. No adhesive-wear with metal
14. Contact angular is very large with molten and nearly no reaction
All above combination makes Si3N4 to be first choice for high-demand bearing ball material and valve ball
Application:
Si3N4 ball can be used in all bearings with special requirement: high speed bearing, high precision bearing;
vacuum bearing; high/low temperature bearing, non-magnetic bearing, high precision ball screw; Si3N4 ball
can also be used as valve ball and metering ball in chemical pump, high-temperature pump, metering pump.
Si3N4 ball can also be usedin linear slider for high temperature and corrosion resistance.
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bearing balls size
Size (inch) Size (mm) Size (inch) Size (mm) 1.5 1/16 " 1.588 2 3/32 2.381 1/8 " 3.175 5/32 " 3.969 3/16 " 4.763 7/32 " 5.556 1/4 " 6.35 17/64 " 6.747 7 9/32 " 7.144 5/16 " 7.938 11/32 " 8.731 3/8 " 9.525 13/32 " 10.319 7/16 " 11.112 29/64 " 11.509 15/32 " 11.906 12 31/64 " 12.303 1/2 " 12.7 17/32 " 13.494 14 9/16 " 14.288 19/32 " 15.081 5/8 " 15.875 21/32 " 16.669 11/16 " 17.463 23/32 " 18.256 3/4 " 19.05 25/32 " 19.844 20 13/16 " 20.638 7/8 " 22.225 15/16 " 23.812 1 " 25.4 1-1/16 " 26.988 1-1/8 " 28.575 2001/3/16 30.163 1-1/4 " 31.75 1-3/8 " 34.925 35 1-1/2 " 38.1 1-5/8 " 41.275 1-11/16 " 42.863 1-7/8 " 47.625 2 " 50.8 -
Our Services
1. Full technical support from concept design to final product delivery
2. On-time delivery with no compromise on quality
3. High-quality product making with advanced equipment and techniques
4. Large-scale of proudction availabl
5. Lower cost (medium-size factory, 3000 square meters), but high-end quality only(the
same quality control system as per big factory)6. Any questions to be sent will get response within 24 hours FAQ
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FAQ
a) How to prolong service life of bearings?
Accurate installation and using,alignment,timely monitor,re lubrication etc.
b) Reason for bearings failure?
Usually is incorrect using method,pollution,improper use of lubricant,damage happened
in installation and handing,also including installation error.according to the traces can
know the reason why is failure.c) How to choose bearings?
Analyse mechanical device and use conditions.clear the requiremment of
bearings.select type of bearings,select distribution way of bearings.selet dimensions of
bearings,select installation method of bearings.d) When select bearings specifications,what you need to consider?
The precision of the bearings(rotating precision,dimensional tolerances)internal
clearance and preload bearing material and heat treatment.structure of cage and material.e) Payment method,packing way,transport method,time of delivery? T/T,PAYPAL,WESTERN UNION,L/C
Tube,box,carton,pallet, By sea,by air 3-15days after receipt of payment.