Machinery's Handbook, 31st Edition
738 V-Block Types Type 1, Style 6, Plain, without Clamps.— Type 1, Style 6 V-block shall be designed sim ilar to the style shown in Fig. 6 and conform to the dimensions and accuracies described in Table 5. The Style 6 block shall be designed plain with a chip relief at the apex of the V-groove. The block shall be furnished in a set of three suitable for general machine shop use.
Fig. 6. Type 1, Style 6 General Machine Shop Support V-Block Table 5. Type 1, Style 6 General Machine Shop Support V-Block
Permitted Deviations (inch)
Grade and Designating Size
Flatness of Working Faces
Matching Tolerance over “V” Length
End/Side Square to Base
Parallelism of Opposite Faces
Parallelism of “V” to Base and Sides
“V” Centrality
Grade A 1 Grade B 1 2
0.0001 0.0002 0.0001 0.0002 0.0004 0.002 0.0004 0.002
0.0002 0.0002
0.0003 0.0003
0.0003 0.0003
0.0002 0.0002
0.001 0.001
0.002 0.002
0.002 0.002
0.001 0.001
2
Nominal Dimensions (inch)
All Grades, Designating Size
Maximum Capacity
Length Width
Height
1 2 3 4 5 6
2.92 3.93 5.90 7.87 9.84 11.81
1.57 1.77 2.16 2.75 3.34 4.13
1.57 1.77 2.16 2.75 3.34 4.13
0.160 to 1.50 0.236 to 1.70 0.315 to 2.10 0.315 to 2.70 0.475 to 3.30 0.600 to 4.10
All dimensions in inches. Type II, Double V-Blocks.— The Type II, Double V-Blocks shall be designed to incorpo rate two V-grooves, as in Fig. 7a, Fig. 7b, and Fig. 7c, on one block machined on opposite sides, and both conforming to the dimensions and accuracies shown in Table 6. Nominal dimensions shown in Table 6 do not encompass all configurations available but define the tolerances that need to be adhered to and define the design parameters. In the case that the design furnishes two V-grooves of different sizes, the accuracy tolerances of the larger size shall apply to both. The Type II, Double V-Block shall be furnished individually or in matched pairs and shall conform to Grade A or Grade B accuracy tolerances and shall come furnished with a clamp or clamps sufficiently robust to enable adequate security of work piece during average drilling or grinding operations. If furnished in matched pairs the clamps shall be usable on either member of the matched set. The clamps shall be designed to engage a single clamping groove along the outer face of the block.
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