• Introduction
Type JGBC-A
The type made from cast iron GG25 (HT-250) material is in compliance with the manufacturing standard of DIN. The chief use of product is not only to inspect the verticality, depth of parallelism of parts, but also to support the workpiece for scribing. Generally, our product is a cube or cuboid in appearance. One of its working surfaces has V-shaped groove.


Size (mm)
Working Surface Parallelism
Flatness of Working Surface
Verticality of Working Surface
Precision (μm)
1
2
1
2
1
2
100x100x100
2
4
2
4
2
4
150x150x150
3
6
3
6
3
6
200x200x200
4
8
2.5
4
4
8
300x300x300
6
12
2.5
4
6
12
400x400x400
8
16
4
8
8
16
500x500x500
20
40
5
12
20
40

Type JGBC-B
This type made from cast iron with cast clamp slots on four sides for work piece support and positioning. The four work faces are machined to DIN 876/III tolerances, with the end faces also being machined. The box cubes can also be used as parallels. Where several box cubes are required in the same size, a surcharge will be made.

No.
Approx. Length
Approx. Width
Approx. height
Approx. Slot Width
mm
mm
mm
mm
1
250
150
100
18
2
300
200
150
18
3
400
250
200
20
4
500
300
250
22
5
600
350
250
22
6
800
500
400
24
7
1000
600
500
30


Type JGBC-C
These cast iron box cubes have five clamping surfaces machined to DIN 876 / III flatness and DIN 875 / II angular accuracy. Cast clamp slots are provided on four faces and the top surface has four machined T slots to DIN 650. One side is open.

No.
Approx. Length
Approx. Width
Approx. height
Approx. Slot Width
Approx. Cast Slot Width
Approx. Length
mm
mm
mm
mm
mm
mm
1
250
180
150
14
16
250
2
300
220
200
14
18
300
3
350
280
250
22
22
350
4
400
350
300
22
22
400
5
500
450
400
22
22
500