Little Machine Shop Mini Mill Bedienungsanleitung
The premier source of tooling, parts, and accessories for bench top machinists.
Mini Mill User’s Guide
from LittleMachineShop.com
© Copyright 2006, LittleMachineShop.com
All rights reserved.
Photos © Copyright 2006, PhotoBoost.com
All rights reserved.
Written by Chris Wood of LittleMachineShop.com.
LittleMachineShop.com
http://www.littlemachineshop.com
396 W. Washington Blvd. #500, Pasadena, CA 91103
(800) 981-9663 • Fax (626) 797-7934
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Contents
Introduction................................................................................. 5
Specifications............................................................................... 5
Safety Considerations ..................................................................... 5
Features ..................................................................................... 6
Basic Accessories........................................................................... 7
Cleaning ..................................................................................... 7
Mounting Your Mill ......................................................................... 7
Operating Controls......................................................................... 8
Motor Controls ........................................................................... 9
High/Low Speed Shifter ...............................................................10
X-Axis Hand Wheel .....................................................................10
X-Axis Lock Lever.......................................................................11
Y-Axis Hand Wheel .....................................................................11
Y-Axis Lock Lever.......................................................................11
Z-Axis Coarse Feed Handles...........................................................11
Z-Axis Fine Feed Knob .................................................................11
Z-Axis Lock Lever.......................................................................12
Adjustments................................................................................12
X-Axis Gib................................................................................12
Y-Axis Gib................................................................................13
Z-Axis Gib................................................................................13
Tramming the Mill......................................................................14
Motor to Intermediate Gear Adjustment ...........................................15
Lubrication.................................................................................16
Lubricating the Transmission Gears .................................................16
Changing Spindle Tools...................................................................17
Squaring a Vise ............................................................................18
Using Parallels .............................................................................19
Clamping with a Clamping Kit...........................................................20
Finding the Edge of a Workpiece .......................................................20
Drilling ......................................................................................22
Milling.......................................................................................23
Conventional Milling Versus Climb Milling.............................................24
Plunge Milling..............................................................................24
Milling Slots ................................................................................25
Surfacing....................................................................................25
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Common Accessories......................................................................25
End Mills .................................................................................25
Work Holding............................................................................26
Vises ......................................................................................26
Clamping Kits and Accessories .......................................................27
Setup Tools..............................................................................28
Maintenance ...............................................................................28
Cleaning..................................................................................28
Motor Brushes...........................................................................28
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Introduction
This user’s guide covers the mini mills that are sold by Grizzly Industrial,
Harbor Freight Tools, Homier Mobile Merchants, Micro-Mark, Cummins Tools,
and Wholesale Tool.
These mills are made in China, in several different factories, but to a similar
set of plans. The general operating principles covered in this document are
common to all of them.
Specifications
The following specifications are common to these mills.
Metric Imperial
Drilling capacity 13 mm dia ½” dia
End mill capacity 16 mm dia 5/8” dia
Face mill capacity 30 mm dia 1.2” dia
X-axis travel 220 mm 8.7”
Y-axis travel 100 mm 3.9”
Z-axis (spindle) travel 180 mm 7”
Spindle tilt ±45° ±45°
Motor power 350 W 0.47 HP
Spindle speed Low range 0-1100 rpm 0-1100 rpm
Spindle speed High range 0-2500 rpm 0-2500 rpm
Spindle taper 3MT or R8 3MT or R8
T-slot width 12 mm 7/16”
Weight (net/gross) 50/68 kg 110/150 lb.
Package size (L x W x H) 560 x 500 x 740 mm 22 x 19.7 x 29.2”
Safety Considerations
Always use common sense when using a power tool. Review the safety
instructions that came with your mill. Besides the general safety rules for any
power tool, the following are specific considerations for the mini mill.
•Your mini mill is just that, a mini, or small mill. Don’t attempt jobs that are
beyond its capacity.
•Check the workpiece after you secure it in the vise or other work holding
device. Be sure it is secure before turning on the mill.
•Don’t wear loose clothing or jewelry when operating the mill.
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Features
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2
3
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4
13
5
6 14
7 15
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1. Motor
2. Drawbar (under
cap)
3. High/low speed
shifter
4. Motor controls
5. Spindle
6. Drill chuck
7. Table
8. Saddle
9. X-axis lock lever
10.Y-axis hand wheel
11.Z-axis fine feed
knob
12.Z-axis coarse feed
handle
13.Z-axis lock lever
14.Column
15.Z-axis travel stop
16.X-axis hand wheel
17.Y-axis lock lever
18.Base
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9 17
18
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Basic Accessories
The following accessories come with most mini mills. Some mini mills come
with additional accessories.
13 mm (1/2”) drill chuck and appropriate arbor
Drawbar
Spindle locking pin
Two T-slot nuts
Oil can
Spanner wrench for spindle nut
Hex wrenches 3, 4, 5, and 6 mm
Open end wrenches 8 x 10 mm, 14 x 17 mm, 17 x 19 mm, and 36 mm.
Cleaning
Your mill will arrive coated with grease to protect it from corrosion during
shipment. Follow this procedure to remove the grease:
1. Wipe most of the grease off with rags or paper towels.
2. Clean the surfaces with mineral spirits (paint thinner).
3. Coat the surfaces with oil.
See the “Lubrication” section on page 16 for specific recommendations for
lubricants.
Mounting Your Mill
The mini mill must be bolted down to the workbench because it is top-heavy. It
is unsafe to operate the mini mill if it is not bolted to a workbench.
Before you mount your mini mill, plan the positioning carefully. If you simply
bolt it to the middle of the workbench, you won’t be able to turn the Y-axis
hand wheel. Either mount the mini mill at the front edge of the bench so the Y-
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axis hand wheel hangs over the edge of the bench, or mount the mini mill on a
riser about 1.5” thick to provide room to turn the Y-axis hand wheel. The
mounting bolts must extend through the riser and bolt the mill to the bench to
keep it from tipping.
Be sure that you have room on both sides of the mill for the X-axis travel. The
table will move to the right so that the left end of the table is almost flush
with the saddle. You need an additional 8” to the right so that you can remove
the table off the right side of the mill. The table moves to the left so that the
right end of the table is almost flush with the saddle.
The following diagram shows the holes required to mount the mill and the clear
area around the bolt pattern to allow use and maintenance of the mini mill.
Mount the mill to the workbench with 3/8” or 10 mm bolts. The bolts should be
about 1” (25 mm) longer than the thickness of the workbench. Use fender
washers on the underside of wooden benches to prevent the nuts from pulling
through.
Operating Controls
There are several controls used to operate the mill. Become familiar with them
before you use the mill.
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Motor Controls
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1. Power switch
2. Speed control
The power switch latches in the off position when you press the big red button.
To turn the switch on, slide the big red button in the direction of the arrow.
The big red button will swing up to the on position.
The power switch interrupts the input power to the speed control circuit
board.
You control the motor speed by adjusting a potentiometer that provides the
speed setting value to the speed control circuit board. There is a safety switch
on the speed control potentiometer that forces you to return the control to
minimum speed when starting the mill.
Always turn the speed control to the minimum speed position before starting
the mill. Starting the mill with the speed control set to a higher speed can
damage the speed control circuit board.
To power up the mill:
1. Turn the speed control to the minimum speed position.
2. Turn on the power by sliding the red cover of the switch up to release the
latch.
Always turn the power off when you leave the mill. Leaving the power on can
damage the speed control circuit board.
To power down the mill:
1. Turn the speed control to the minimum speed position.
2. Turn off the power by latching the red cover of the switch.
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To start the mill:
1. Ensure that the speed control is set to the minimum speed position.
2. Advance the speed control to the desired speed.
To stop the mill:
•Turn the speed control to the minimum speed position.
High/Low Speed Shifter
The high/low speed shifter is on the left side of the spindle housing. It selects
the spindle speed range.
Low speed range 0-1100 RPM
High speed range 0-2500 RPM
Never move this lever when the mill is turning. You might need to turn the
spindle slightly by hand as you move the high/low speed shifter to engage the
gears.
X-Axis Hand Wheel
The X-axis hand wheel moves the table to the left or right, depending on which
way it is turned. Use this hand wheel to position the table.
The dial on this handle indicates the relative position of the table. The
graduated dial can be repositioned for convenience. Each division of the dial
represents a movement of 0.001”.
On some mini mills there are 62.5 divisions on the dial. On these mills, each
full turn of the hand wheel moves the table 1/16” (0.0625”).
Other mini mills have 50 graduations on the dial. On these mills, each full turn
of the hand wheel moves the table 0.050”.
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Inhaltsverzeichnis
