we can provide custom size zirconium oxide ceramic round and oval ring for many kinds of pad printing machine.
There has been much debate as to which doctor ring material is best for doctoring pad printing plates. The market for pad printing supplies originally started with tungsten carbide steel doctor rings and many were successfully implemented. Today, bothTungsten Carbide and zirconium oxide ceramic rings work extremely well. The zirconium oxide ceramic doctor ring offers some advantages. One of the primary advantages of the zirconia ceramic ring has a “self-lubricating” qualities that make it work equally well on thin and thick steel pad printing plate, especially the softer polymer pad printing plates.
Material composition
Item
Unit
Zirconia
Composition
wt%
94.6%ZrO2，5.4%Y2O3
Density
g/cm3
6.00
Hardness
HV(HRC)
1200(70)
Bending Strength
MPa
1150
Fracture Toughness
MPa.m1/2
9
Modulus of Elasticity
GPa
205
Thermal Conductivity
W/mk
3
Thermal Expansion Coefficient
10-6/k
10.5
Standard Sizes of Round Ceramic Rings
Standard rings
D/mm(outer dia.)
d/mm(inner dia.)
H/mm(height)
Degree
Note
D60d53H12
60
53
12
60
Single edge
D60d53H12-2
60
53
12
60
Double edge
D90d82H12
90
82
12
60
Single edge
D90d82H12-2
90
82
12
60
Double edge
D135d126H14
135
126
14
60
Single edge
D135d126H14-2
135
126
14
60
Double edge
D165d155H14
165
155
14
60
Single edge
D165d155H14-2
165
155
14
60
Double edge
D188d180H14
188
180
14
60
Single edge
D201d189H16
201
189
16
60
Single edge
D256d244H16
256
244
16
60
Single edge
*
*
*
*
*
D65d60H5.1
65
60
5.1
30
Single edge
D95d90H5.1
95
90
5.1
30
Single edge
D135d130H5.1
135
130
5.1
30
Single edge
*
*
*
*
*
D92d86H9
92
86
9
60
Single edge
D126d120H9
126
120
9
60
Single edge
*
*
*
*
*
D60d50H12
60
50
12
45
Single edge
D75d66H12
75
66
12
45
Single edge
D82d70H12
82
70
12
45
Single edge
D100d90H12
100
90
12
45
Single edge
D110d100H12
110
100
12
45
Single edge
D120d110H12
120
110
12
45
Single edge
D130d120H12
130
120
12
45
Single edge
D140d130H12
140
130
12
45
Single edge
D150d140H14
150
140
12
45
Single edge
Other Custom Standard
*
*
*
*
Standard Sizes of Oval Ceramic Rings length 350 width120 height 14 length 225 width115 height 14 length 140 width 75 height 12 Other Custom Standard
