Granite plates are manufactured according to the standards of developed countries; the flatness toler ance is in accordance with granite surface plate standard of GB/T20428-2006 and the Verification Regulation of plates JJG117-2005.
Measuring Temperature 20±2℃
Grade 000: 1x(1+d/1000)
Grade 00: 2x(1+d/1000)
Grade 0: 4x(1+d/1000)
Grade 1: 8x(1+d/1000)
(d for diagonal length, mm)
1. Granite parallels blocks CDGPB series
Order No. |
Type(mm) |
Precision grade (μm) |
CDGPB900-9001 |
40×38×25 |
1.5 |
CDGPB900-9002 |
50×48×35 |
1.8 |
CDGPB900-9003 |
60×58×35 |
2.5 |
CDGPB900-9004 |
70×68×45 |
3.0 |
CDGPB900-9005 |
80×78×50 |
3.5 |
2. Granite Vee Blocks CDGVB series
V-shaped Block: applicable to measurement of concentric, circular degree, symmetry and run-out tolerance of rotational parts.
Order No. |
Type(mm) |
Flatness of working surface |
Parallelism between Vslot and bottom surface |
Parallelism between Vslot and side surface |
Symmetry between Vslot and side surface |
Squareness between Vslot and end surface |
Squareness between Vslot and bottom surface |
Height differ ence of the Vslot with in amatched pair |
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Precision grade(μm) |
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0 |
1 |
0 |
1 |
0 |
1 |
0 |
1 |
0 |
1 |
0 |
1 |
0 |
1 |
||
CDGVB600-6001 |
40x90° |
1 |
2 |
3 |
1 |
3 |
6 |
5 |
10 |
5 |
5 |
3 |
6 |
4 |
6 |
CDGVB600-6002 |
63x90° |
2 |
3 |
4 |
6 |
4 |
8 |
8 |
16 |
8 |
8 |
4 |
8 |
5 |
10 |
CDGVB600-6003 |
100x90° |
2 |
4 |
4 |
8 |
4 |
8 |
8 |
16 |
8 |
8 |
4 |
8 |
5 |
10 |
CDGVB600-6004 |
160x90° |
2. 5 |
5 |
5 |
10 |
5 |
10 |
10 |
20 |
10 |
10 |
5 |
10 |
6 |
12 |
3. Granite Box CDGBX series
Inspection of parallelism, perpendicularity and various position errors.
Order No. |
Type (mm) |
Parallelism of working surface |
Flatness of working surface |
Perpendicularity of working surface |
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Precision grade(μm) |
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00 |
0 |
00 |
0 |
00 |
0 |
||
CDGBX700-7001 |
50×50×50 |
1 |
2 |
1 |
2 |
0.5 |
1 |
CDGBX700-7002 |
100×100×100 |
1 |
2 |
1 |
2 |
1 |
2 |
CDGBX700-7003 |
150×150×150 |
1.5 |
3 |
1 |
2 |
1.5 |
3 |
CDGBX700-7004 |
200×200×200 |
2 |
4 |
1.5 |
3 |
2 |
4 |
CDGBX700-7005 |
300×300×300 |
3 |
6 |
1.5 |
3 |
3 |
6 |
CDGBX700-7006 |
400×400×400 |
4 |
8 |
2 |
4 |
4 |
8 |
CDGBX700-7007 |
500×500×500 |
5 |
10 |
2.5 |
5 |
5 |
1 |
CDGBX700-7008 |
600×600×600 |
6 |
12 |
3 |
6 |
6 |
12 |
CDGBX700-7009 |
700×700×700 |
7 |
14 |
3.5 |
7 |
7 |
14 |
CDGBX700-7010 |
800×800×800 |
8 |
16 |
4 |
8 |
8 |
16 |
4. Granite Straight Edges CDGSE series
Applicable to measurement of straightness and flatness.
Order No. |
Type(mm) |
Flatness |
Straightness of measuring surface |
Parallelism between opposite measuring surface |
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Precision grade(μm) |
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00 |
0 |
00 |
0 |
00 |
0 |
||
CDGSE400-4001 |
400x60x25 |
1.6 |
2.6 |
2.4 |
3.9 |
8 |
13 |
CDGSE400-4002 |
630x100x35 |
2.1 |
3.5 |
3.2 |
5.3 |
10.5 |
18 |
CDGSE400-4003 |
1000x160x50 |
3 |
5 |
4.5 |
7.5 |
15 |
25 |
CDGSE400-4004 |
1600x250x80 |
4.4 |
7.4 |
6.6 |
11.1 |
22 |
37 |
CDGSE400-4005 |
2000x300x100 |
5.4 |
10 |
8.1 |
13.5 |
27 |
45 |
5. Granite Parallels CDGPL series
As a substitute product for equal-height block, the parallel gauge is used for the measurement of parallel ism of parts and is supplied in a pair or pairs.
Order No. |
Type(mm) |
Flatness of working sur face & parallelism of opposite surface |
Squareness between working surfaces |
Tolerance of H.W between matched pair |
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Precision grade (μm) |
|||||||
00 |
0 |
00 |
0 |
00 |
0 |
||
CDGPL500-5001 |
160x25x16 |
1.5 |
3 |
20 |
40 |
1.5 |
3 |
CDGPL500-5002 |
250x40x25 |
2 |
4 |
30 |
60 |
2 |
4 |
CDGPL500-5003 |
400x63x40 |
4 |
8 |
40 |
80 |
4 |
8 |
CDGPL500-5004 |
630x100x63 |
6 |
12 |
50 |
100 |
6 |
12 |
6.Granite Squares Rulers CDGSR series
Applicable to detection of perpendicularity and parallelism and used as absolute measurement reference of 90°.
Order No. |
Type(mm) |
Squareness beteween abjacent measuring surfaces |
Flatness & straightness of measuring surface |
Parallelism between opposite measuring surface |
|||
Precision grade(μm) |
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00 |
0 |
00 |
0 |
00 |
0 |
||
CDGSR200-2001 |
150x150 |
1.8 |
3.5 |
0.8 |
1.6 |
1.8 |
3.5 |
CDGSR200-2002 |
160x160 |
2 |
4 |
0.8 |
1.7 |
2 |
4 |
CDGSR200-2003 |
200x200 |
2 |
4 |
0.9 |
1.8 |
2 |
4 |
CDGSR200-2004 |
250x250 |
2.2 |
4.5 |
1 |
2 |
2.2 |
4.5 |
CDGSR200-2005 |
315x315 |
2.6 |
5.2 |
1.1 |
2.3 |
2.6 |
5.5 |
CDGSR200-2006 |
400x400 |
3 |
6 |
1.3 |
2.6 |
3 |
6 |
CDGSR200-2007 |
500x500 |
3.5 |
7 |
1.5 |
3 |
3.5 |
7 |
7.Granite Squares CDGSQ series
Applicable to measurement of parts, main shaft of machine tools and various
Order No. |
Type(mm) |
Squareness beteween measuring surface datum surface |
Flatness & straightness of measuring surface |
Flatness & straightness of datum surface |
|||
Precision grade(μm) |
|||||||
00 |
0 |
00 |
0 |
00 |
0 |
||
CDGSQ300-3001 |
100x63 |
1.5 |
3 |
1 |
1 |
1 |
1 |
CDGSQ300-3002 |
160x100 |
2 |
4 |
1 |
2 |
1 |
1 |
CDGSQ300-3003 |
250x160 |
2 |
4 |
1 |
2 |
1 |
2 |
CDGSQ300-3004 |
400x250 |
3 |
6 |
1.5 |
3 |
1 |
2 |
CDGSQ300-3005 |
630x400 |
4 |
8 |
2 |
4 |
1.5 |
3 |
CDGSQ300-3006 |
1000x630 |
6 |
12 |
2.5 |
5 |
2 |
4 |
Application
Granite gauge and blocks are widely used for precision measurement and calibration of precision instruments.