Grizzly H8371 Manuale utente

Specifications

Motor ................................................. 110V 60Hz

Speed ............................................... 4–160 RPM

Maximum Torque .................................650 in./lb.

Inventory

Refer to Figure 1 and the table below to inventory

the contents of the shipping box.

MODEL H8371

POWER FEED

FOR KNEE MILLS

INSTRUCTIONS









Figure 1. Model H8371 inventory.

WARNING: NO PORTION OF THIS MANUAL MAY BE REPRODUCED IN ANY SHAPE

OR FORM WITHOUT THE WRITTEN APPROVAL OF GRIZZLY INDUSTRIAL, INC.

#TS10534 PRINTED IN TAIWAN

Bolt Bag Inventory Qty

Spacer Set 34mm .............................................. 1

Spacer Set 16mm .............................................. 1

Bushing Spacer ................................................. 1

Slotted Flat Washer ........................................... 1

Special Hex Nut 1⁄2"-20 ...................................... 1

Cap Screws 1⁄4"-20 x 1" ..................................... 2

Roll Pins 5.1 x 14mm ........................................ 2

Phillips Head Screws #10-24 x 3⁄8" .................... 2

Flat Washers 5mm ............................................ 2

Cable Clamps .................................................... 2

Tie Wraps .......................................................... 2

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.

If you need help with your new power feed, call

our Tech Support at: (570) 546-9663.

REF PART # DESCRIPTION

1 PH8371001 MOUNTING BRACKET

2 PH8371002 POWER FEED & LIMIT SWITCH ASSY

3 PH8371003 COMPLETE BOLT BAG

4 PH8371004 LIMIT STOP ASSEMBLY

5 PH8371005 BEVEL GEAR BRASS

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.

-2- H8371 Power Feed for Knee Mills

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









Figure 2. Power feed system.

A. Limit Switch: Stops powered table move-

ment when either limit stop presses a plunger

on the switch.

B. Limit Stop: Activates the limit switch. Secure

these devices along the table to set the range

of movement.

C. Rapid Movement Button: Moves the table

at the maximum speed in the direction select-

ed.

D. Direction Lever: Starts, reverses, and stops

longitudinal table movement.

E. Speed Dial: Controls the speed that the table

moves—turn the dial clockwise to increase

the speed.

F. Reset Button: When a current over 3.5

amps passes through the unit for more than

10 seconds, the internal circuit switch will cut

the power to the unit. Investigate and resolve

any problems, then use this button to reset

the internal circuit switch.

G. ON/OFF Switch: The master power switch

for the power feed.

H. Power Lamp: Lights when the power feed is

turned ON.

Functional Overview

The Model H8371 power feed is designed to

install on the right side of a knee mill table to pro-

vide powered longitudinal movement of the table.

Refer to Figure 2 and the descriptions below to

become familiar with the functional parts of the

power feed system.

Installation

1. DISCONNECT THE MILL FROM POWER!

Note: During the next step, take care not to

misplace the leadscrew keys.

2. Remove the handle and graduated dial

assemblies from the right side of the longitu-

dinal (X-axis) leadscrew.

3. Determine if there is adequate support on

the mill to mount the power feed unit onto the

leadscrew.

— If adequate mounting for the power feed

unit exists at the end of the leadscrew, you

do not need to use the optional mounting

bracket. Continue with Step 4.

— If there is not adequate mounting for the

power feed unit, you will need to use the

provided mounting bracket. Proceed to

Using the Mounting Bracket on Page 4.

4. Make sure the leadscrew is clean of debris

and oil, then slide the power feed unit onto

the leadscrew and up against the mill, as

shown in Figure 3.

Figure 3. Power feed unit mounted on the

leadscrew.

Spacers

Leadscrew

Keys

Cap Screws

Note: Use the spacers provided where nec-

essary to ensure that the parts installed on

the leadscrew stay snug up against one

another.

H8371 Power Feed for Knee Mills -3-

5. Secure the power feed unit to the mill with the

cap screws.

Note: If the threaded holes in the mill do not

align with the holes provided in the power

feed unit, drill and tap holes in the mill as

necessary to properly secure the unit to the

mill.

6. Install the keys onto the leadscrew.

7. Remove the plastic protective cap from the

brass bevel gear, align the keyway in the

gear with the leadscrew keys, then slide the

gear onto the leadscrew and up against the

power feed unit (see Figure 4).

Note: Make sure that the teeth of the bevel

gear and drive gear mesh properly.

Figure 4. Brass bevel gear installed onto the

leadscrew.

Brass

Bevel

Gear

8. Re-install the graduated dial and handle

assemblies.

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!

10. Position and mount the limit switch in the

center of the saddle, as shown in Figure 5,

so that the plungers on the sides of the unit

align with the limit stops.

11. Make sure the ON/OFF switch is in the OFF

position, then connect the power feed unit to

a grounded 110V power source.

Figure 5. Example of limit switch and limit stops

installed.

Limit Switch

Limit Stops

9. Slide the T-nuts of the limit stops into the

front slot of the table (see Figure 5), position

them to limit the range of table movement,

then tighten the hex bolts to secure them in

place.

-4- H8371 Power Feed for Knee Mills

Using the Mounting Bracket

1. Use the roll pins and cap screws to install the

power feed unit onto the mounting bracket

(see Figure 6).

Figure 7. Example of power feed unit installed

with the mounting bracket.

Mounting Bracket

Figure 6. Mounting bracket.

Roll Pins

Mounting Bracket

2. Make sure the leadscrew is clean of debris

and oil, then slide the assembly onto the

leadscrew to mark the points needed to drill

and tap holes for mounting screws in the side

of the table.

Note: Use the spacers provided where nec-

essary to ensure that the parts installed on

the leadscrew stay snug up against one

another.

3. Remove the assembly, drill and tap the

mounting holes, re-install the power feed

assembly onto the leadscrew, then secure the

mounting bracket to the table (see Figure 7.

Maintenance

Clean and lubricate the power feed gearing every

three months of normal use.

To clean and lubricate the power feed gear-

ing:

1. DISCONNECT THE MILL AND POWER

FEED FROM POWER!

2. Remove the handle and graduated dial

assemblies.

3. Slide the brass bevel gear from the lead-

screw, then remove the leadscrew keys.

4. Clean the debris and built-up grime from the

leadscrew and the gearing.

5. Brush a light coat of all-purpose grease onto

the teeth of the bevel and drive gears.

6. Re-install the parts removed in reverse

order.

4. Continue with Step 6 on Page 3.

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