Downfeed Controls - Grizzly G0757 Owner's Manual

5. Arrange V-belts for the desired horizontal
spindle speed (see Figure 30).
Note: The horizontal spindle speed chart
shown below is also on side of ram.
Horizontal Spindle Speeds
RPM
72 D – E
170 D – F
210 D – G
240 C – E
290 B – E
550 C – F
830 B – G
1300 A – F
Figure 30. Horizontal spindle speed chart.
6. Apply pressure on lower idler pulley to the left
as you tighten tension thumbwheel.
Note: There is proper V-belt tension when
approximately ⁄ " –
1
4
(see Figure 28 on the previous page) by
applying moderate pressure midway between
pulleys.
7. Retighten hex nut behind lower idler pulley
bracket.
8. Close and latch V-belt cover.
Model G0757 (Mfg. Since 6/13)
Spindle
A
B
C
D
G
F
E
Motor
⁄ " deflection is achieved
1
2

Downfeed Controls

Use Figure 31 and the descriptions below to
understand the downfeed components that con-
trol the 5" spindle downfeed travel.
Fine
Downfeed
Handwheel
Quill
Lock
Figure 31. Spindle downfeed controls.
Fine Downfeed Handwheel: Manually controls
slow downfeed travel. The attached graduated
dial has increments of 0.001" with one full revolu-
tion representing 0.200" of travel.
Selection Lever: When tightened, enables the
fine downfeed handwheel; conversely, when loos-
ened enables the coarse downfeed levers.
Coarse Downfeed Levers: Manually control
rapid downfeed travel.
Quill Lock: Secures the quill in place for increased
stability during operations.
Selection
Lever
Coarse
Downfeed Lever
-33-