Clamp Block Chart


The Clamp Block (otherwise know as the T-Nut) is what clamps the tool to the bedways of your lathe. This block will vary depending on which model of lathe you have.

The following Oneway products require a clap block to secure it to the lathe bed. Please make sure you order the appropriate size clamp block for your lathe when ordering any of these products.

This table shows the more common sizes of Clamp Block:

Part No.
W
L
Bedways Gap
Lathe Description
3154-125
1.25
1.63
Tapered
3154-131
1.31
1.63
1 3/8
3154-143
1.44
1.81
1 ½
Delta
3154-156
1.56
2.13
1 5/8
3154-169
1.69
2.25
1 ¾
Oneway Large Lathes
Nichols
General 160 & 260
3154-181
1.81
2.44
1 7/8
Stubby
3154-194
1.94
2.50
2
3154-206
2.06
2.56
2 1/8
3154-231
2.31
2.63
2 ¼
Vicmarc VL300 & VL175
3154-244
2.44
3.06
2 ½
Woodfast
Powermatic 3520
3154-256
2.56
3.19
2 5/8
3154-269
2.69
3.31
2 ¾
3154-281
2.81
3.44
2 7/8
3154-294
2.94
3.56
3
3154-306
3.06
3.69
3 1/8

W = The distance between the bedways (inches) - this is the most important dimension.

L = The amount of "clamp" the bed-ways have.