Glossary; Fractions/Decimals - Grizzly WOOD MILL G9959 Instruction Manual

Glossary

Arbor – The shank for a drill chuck, cutter holder
or other device that is inserted into a spindle.
Back Lash – The amount of play between a lead
screw and nut or between two gears.
Collet – Device for holding cutting tools in a spin-
dle.
End Mill – Cutting tool used for slotting and fac-
ing in metal.
Facing – Cutting a surface to reveal a new face.
To reduce the thickness of a workpiece.
Fly Cutter – Cutting tool used for a facing opera-
tion.
Gib – A tapered strip of metal in the dovetail
ways that can be adjusted for wear.
Head Stock – That portion of the machine that
supports the spindle/quill assembly.
Lead Screw – The threaded rod that when
Fraction
1
⁄
64
1 ⁄
32
3
⁄
64
1 ⁄
16
5
⁄
64
3 ⁄
32
7
⁄
64
1 ⁄
8
9
⁄
64
5 ⁄
32
11
⁄
64
3 ⁄
16
13
⁄
64
7 ⁄
32
15
⁄
64
1 ⁄
4
17
⁄
64
9 ⁄
32
19
⁄
64
5 ⁄
16
21
⁄
64
11 ⁄
32
Decimal Fraction
23
0.015625 ⁄
64
0.031250 3 ⁄
8
25
0.046875 ⁄
64
0.062500 13 ⁄
32
27
0.078125 ⁄
64
0.093750 7 ⁄
16
29
0.109375 ⁄
64
0.125000 15 ⁄
32
31
0.140625 ⁄
64
0.156250 1 ⁄
2
33
0.171875 ⁄
64
0.187500 17 ⁄
32
35
0.203125 ⁄
64
0.218750 9 ⁄
16
37
0.234375 ⁄
64
0.250000 19 ⁄
32
39
0.265625 ⁄
64
0.281250 5 ⁄
8
41
0.296875 ⁄
64
0.312500 21 ⁄
32
43
0.328125 ⁄
64
0.343750 11 ⁄
16
turned, causes the table to move.
Quill – Houses the spindle and allows the spin-
dle to be adjusted up and down in the head stock.
R-8 – Designation for the spindle taper. Universal
in that all arbors and collets with this number will
fit this spindle.
X Axis – The direction of motion when the table
moves from left to right or right to left. Turning the
longitudinal hand crank creates this motion.
Y Axis – The direction of motion when the table
moves from front to back or from back to front.
Turning the cross slide hand crank creates this
motion.
Z Axis – The direction of motion when the table
or spindle moves up or down. Turning the knee
hand crank or the spindle handles creates this
motion.
Zero the Dial – Having positioned the table to a
desired location, the dial on the hand crank is
rotated to zero while maintaining the hand crank
position.
Decimal Fraction
45
0.359375 ⁄
64
0.375000 23 ⁄
32
47
0.390625 ⁄
64
0.406250 3 ⁄
4
49
0.421875 ⁄
64
0.437500 25 ⁄
32
51
0.453125 ⁄
64
0.468750 13 ⁄
16
53
0.484375 ⁄
64
0.500000 27 ⁄
32
55
0.515625 ⁄
64
0.531250 7 ⁄
8
57
0.546875 ⁄
64
0.562500 29 ⁄
32
59
0.578125 ⁄
64
0.593750 15 ⁄
16
61
0.609375 ⁄
64
0.625000 31 ⁄
32
63
0.640625 ⁄
64
0.656250 1
0.671875
0.687500 1mm
Decimal
0.703125
0.718750
0.734375
0.750000
0.765625
0.781250
0.796875
0.812500
0.828125
0.843750
0.859375
0.875000
0.890625
0.906250
0.921875
0.937500
0.953125
0.968750
0.984375
1.000000
3.141593
0.03937"
-11-