Grizzly H8370 User manual

Specifications
Motor ................................................. 110V 60Hz
Speed ............................................... 4–200 RPM
Maximum Torque .................................440 in./lb.
Bevel Gear to Drive Gear Ratio ..................... 4:1
Inventory
Refer to Figure 1 and the table below to inventory
the contents of the shipping box.
MODEL H8370
POWER FEED
FOR MILL/DRILLS
INSTRUCTIONS
COPYRIGHT © MARCH, 2008 BY GRIZZLY INDUSTRIAL, INC.
WARNING: NO PORTION OF THIS MANUAL MAY BE REPRODUCED IN ANY SHAPE
OR FORM WITHOUT THE WRITTEN APPROVAL OF GRIZZLY INDUSTRIAL, INC.
#TS10533 PRINTED IN TAIWAN
If any nonproprietary parts are missing (e.g. a
washer or a spacer), we will gladly replace them;
or for the sake of expediency, replacements can
be obtained at your local hardware store.
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Figure 1. Model H8370 inventory.
REF PART # DESCRIPTION
1 PH8370001 MOUNTING ASSEMBLY
2 PH8370002 GEAR SAFETY COVER
3 PH8370003 POWER FEED & LIMIT SWITCH ASSY
4 PH8370004 LIMIT STOP
5 PH8370005 LIMIT SWITCH BRACKET
6 PH8370006 LEADSCREW GEAR
7 PH8370007 RAPID SWITCH
8 PH8370008 ZYTEL GEAR
If you need help with your new power feed, call
our Tech Support at: [phone].
Wear safety glasses dur-
ing the entire setup pro-
cess!

-2- H8370 Power Feed for Mill/Drills
Functional Overview
The Model H8370 power feed is designed to
install on the left side of a mill/drill table to pro-
vide powered longitudinal movement of the table.
Refer to Figures 2–3 and the descriptions below
to become familiar with the functional parts of the
power feed system.
Figure 2. Power feed controls.
E
AB
D
C
Figure 3. Limit switch and stops.
G
F
A. Direction Lever: Starts, reverses, and stops
longitudinal table movement.
B. Rapid Movement Button: Moves the table
at the maximum speed in the direction select-
ed.
C. ON/OFF Switch: The master power switch
for the power feed.
D. Speed Dial: Controls the speed that the table
moves—turn the dial clockwise to increase
the speed.
E. Power Lamp: Lights when the power feed is
turned ON.
F. Limit Stops: Activate the limit switch. Secure
these devices along the table to set the range
of movement.
G. Limit Switch: Stops powered table move-
ment when either limit stop presses a plunger
on the switch.
Installation
Tools Needed Qty
Hex Wrench 2.5mm ........................................... 1
Hex Wrench 5mm .............................................. 1
Hex Wrench 6mm .............................................. 1
Wrench 12mm ................................................... 1
To install the power feed:
1. DISCONNECT MILL/DRILL FROM POWER!
2. Remove the handle assembly from the left
side of the longitudinal leadscrew.
3. Slide the provided leadscrew gear onto the
leadscrew and into the fingers of the coupler,
as shown in Figure 4, then tighten the set
screw of the gear to secure it.
Figure 4. Leadscrew gear installed onto the
leadscrew.
Coupler
Leadscrew
Gear Set Screw

H8370 Power Feed for Mill/Drills -3-
4. Separate the two pieces of the mounting
assembly, then place the table bracket over
the lip of the table trough, as shown in
Figure 5.
Figure 5. Table bracket mounted on the lip of
the table trough.
Table
Bracket
5. Mark the points on the table where the table
bracket hex bolts make contact, then remove
the bracket from the table.
6. Spot drill the points marked in Step 5 to give
the hex bolts a small spot to "bite" the table
without slipping on the rough cast surface.
7. Set the bracket back on the table and tighten
down the hex bolts.
8. Install the mounting bracket onto the power
feed assembly with the two cap screws pro-
vided, as shown in Figure 6, but do not yet
fully tighten them.
9. Connect the electrical plugs of the mounting
bracket and power feed.
10. Position the assembly from Step 8 onto the
table bracket so that the teeth of the drive
gear and the leadscrew gear mesh exact-
ly, then tighten the mounting bracket cap
screws and the table bracket hex bolts (see
Figures 7–8).
Figure 7. Power feed drive gear and leadscrew
gear properly meshed.
Drive Gear
Leadscrew Gear
Figure 8. Installing the power feed and mounting
bracket assembly onto the table bracket.
Figure 6. Mounting bracket installed onto the
power feed unit.
Mounting
Bracket
Electrical
Plugs
Be sure there is enough running clearance
between the table, spindle, vise/clamps, or
jigs before turning the power feed ON. Be
aware that all of these objects represent
potential pinch points.

-4- H8370 Power Feed for Mill/Drills
Electrocution or fire could
result if machine is not
grounded and installed in
compliance with electrical
codes. Compliance MUST
be verified by a qualified
electrician!
11. Remove the backing from the adhesive tape
on the gear safety cover flanges, then mount
the cover on the assembly, as shown in
Figure 9.
Figure 9. Installing the gear safety cover.
Gear
Safety
Cover
12. Slide the T-nuts of the limit stops into the
front slot of the table, and position them near
the ends of the slots, then tighten the cap
screws to secure them in place.
13. Install the bracket and limit switch in the cen-
ter of the saddle, as shown in Figure 10, so
that the plungers on the sides of the switch
align with the limit stops.
Figure 10. Installing the bracket and limit switch.
Limit
Switch
Bracket
14. Make sure the ON/OFF switch is in the OFF
position, then connect the power feed unit to
a grounded 110V power source.
Maintenance
Clean and lubricate the power feed gearing every
three months of normal use.
1. DISCONNECT THE MILL/DRILL AND
POWER FEED FROM POWER!
2. Remove the gear safety cover.
3. Remove the power feed assembly from the
table bracket.
4. Clean the debris and built-up grime from
the drive gear, leadscrew gear, and the sur-
rounding area.
5. Brush a light coat of all-purpose grease onto
the teeth of the drive and leadscrew gears.
6. Re-install the parts removed in reverse
order.