7” x 10” Precision Mini Lathe Model 93212 Set up and Operating Instructions Visit our website at: http://www.harborfreight.com Read this material before using this product. Failure to do so can result in serious injury. Save this manual. Copyright© 2006 by Harbor Freight Tools®. All rights reserved. No portion of this manual or any artwork contained herein may be reproduced in any shape or form without the express written consent of Harbor Freight Tools.
Contents Important SAFETY Information ���������������������������������3 General Tool Safety Warnings � 3 Grounding Instructions ����������5 110-120 V~ Grounded Tools: Tools with Three Prong Plugs 5 Mini Lathe Safety Warnings ��������� 5 Specifications �������������������������������8 Unpacking ���������������������������������������8 Packing List ���������������������������������������� 8 General Mini Lathe Components ��������������������������������9 Power Controls overview ���10 Operation �����������
NOTICE is used to address practices not related to personal injury. Save This Manual Keep this manual for the safety warnings and precautions, assembly, operating, inspection, maintenance and cleaning procedures. Write the product’s serial number in the back of the manual near the assembly diagram (or month and year of purchase if product has no number). Keep this manual and the receipt in a safe and dry place for future reference.
8. USE RIGHT TOOL. Don’t force tool or attachment to do a job for which it was not designed. RECOMMENDED MINIMUM WIRE GAUGE FOR EXTENSION CORDS (120 VOLT) NAMEPLATE AMPERES (at full load) EXTENSION CORD LENGTH 25’ 50’ 100’ 150’ 0–6 18 16 16 14 6.1 – 10 18 16 14 12 10.1 – 12 16 16 14 12 12.1 – 16 14 12 Do not use. TABLE A 9. USE PROPER EXTENSION CORD. Make sure your extension cord is in good condition.
3-pole receptacles that accept the tool’s plug. Grounding Instructions To prevent electric shock and death from incorrect grounding wire connection Read and follow these instructions: 6. Grounding Pin 110-120 V~ Grounded Tools: Tools with Three Prong Plugs 1. In the event of a malfunction or breakdown, grounding provides a path of least resistance for electric current to reduce the risk of electric shock.
. Do not operate with ANY guard disabled, damaged, or removed. Moving guards must move freely and close instantly. 7. Rotate workpiece by hand before applying power. 8. Rough out workpiece before installing on faceplate. 9. Do not mount split workpiece or one containing knot. 10. Use lowest speed when starting new workpiece. 11. Do not reverse motor direction while the lathe is in motion. 12. Do not clear chips by hand or when lathe is running.
Your risk from these exposures varies, depending on how often you do this type of work. To reduce your exposure to these chemicals: work in a well ventilated area, and work with approved safety equipment, such as those dust masks that are specially designed to filter out microscopic particles. (California Health & Safety Code § 25249.5, et seq.) 27.
Specifications Motor Packing List 120 V~ / 60 Hz / 3/4 HP 0 - 1100 RPM (Low) 0 - 2500 RPM (High) Fast Acting 4 amp mini glass (F4AL250VP) Lx136 Pitch: 1.5mm Teeth: 70 Speed Ranges Fuse Type Belt Drive Gear and Belt Swing Over Bed 7” Dist. Between Centers 10” Swing Over Cross Slide 2-1/8” Swing Over Saddle 4-1/2” Swing Over Gap 7” Max. Tool Bit Size 5/16” Compound Travel 2-3/4” Carriage Travel 6-1/2” Cross Slide Travel 2-3/4” Work Tolerance 0.
General Mini Lathe Components Note: Refer to the parts list and diagram at the end of this manual for complete part number listings and locations. See the following page for a description of the major components.
Power Controls overview Controls on the Front of the Lathe Controls on the Back of the Lathe Feed Direction Selector (35) Forward-OFF-Reverse Switch (181) Power Switch (178) Speed Control Knob (180) H/L Gear Shift Lever (33) Figure 2 Power Switch (178) Turns on and off power to the motor. When the Power Switch is lit, the motor is on. Forward-OFF-Reverse Switch (181) Changes the Spindle (3) (Chuck (2)) rotation from Forward (clockwise), to OFF (no rotation), to Reverse (counterclockwise).
Lathe components overview Following are brief descriptions of major components of the Mini Lathe. Bed Way (1) - The Bed Way is the base of the work area under the Chuck and Tailstock. It is where the Tailstock and Compound Rest are attached and what they slide along. Chuck (2) - The Chuck holds the three Jaws (two sets included) which clamp the work piece in place.
Assembly Instructions To Mount the Lathe to a Workbench: Drill holes for permanent mounting: 14-7/8” 1. 2. 2-7/8” Note: For additional information regarding the parts listed in the following pages, refer to the Assembly Diagram near the end of this manual. WARNING! Make sure the Power Switch of the tool is in its “OFF” position and that the tool is unplugged from its electrical outlet before making any adjustments to the tool. Figure 5 Unthread the Bolts (67) from the bottom of the unit.
Installing Guards Protective Cover (235) Chuck Guard (201) Washer (239), Spring (237), and Nut (240). Then, thread the Screw (238) into the Compound Rest (108). Slide the notch in the Protective Cover (235) over the end of the Slotted Screw (236). Figure 7 Figure 8 1. To install the Chuck Guard (201), remove the two Screws (73) on the Hinge (202). Attach the Chuck Guard (201) to the Hinge using the Screws. The Chuck Guard should be aligned so that it covers the Chuck (2) when swung down over it.
Feeding Direction Selector (35) to the middle (Neutral). SET UP Initial Test Run Forward/OFF/Reverse Switch (181) Fuse Holder (179) Before further set-up of the Lathe, check that the power components are working properly by performing the following test run. 1. Check that all loose parts and tools are out of the way and nothing will interfere with the Chuck (2) when it rotates. Power Switch (178) Speed Control Knob (180) Figure 12 Chuck (2) Figure 10 Nuts (6) Spindle (3) 2.
setting, and letting it run for several minutes at each setting before increasing to the next level. Continue until you’ve run the Lathe all the way up to the highest setting. Replacement of Chuck Chuck (2) 11. Turn the Power Switch OFF and wait for the Lathe to come to a complete stop. 12. Repeat the process with the H/L Gear Shift Lever at the High setting. Then repeat at both the Low, then High setting with the Forward/OFF/Reverse Switch in the Reverse position.
in the Chuck groove. The Jaws are designed to work as complete sets. Do not mix pieces from one set with the other set when installing in the Chuck. Chuck Key (167) A Lead thread of Scroll B Insert Jaw #1 Jaw Scroll Grooves Figure 15 Chuck (2) Chuck (2) The jaws are held in place by a spiralled scroll inside the Chuck which rotates around the center of the chuck with the Chuck Key.
slightly, then clockwise, to engage the lead thread into the Jaw (B and C in Figure 16). Tailstock Adjustments The Tailstock (138) holds tools, such as the Live Center (143), which are used with the Chuck Jaws (167 or 168) to hold work pieces in place. e. Slide Jaw #2 into the next groove and continue turning the Chuck Key clockwise to advance the lead thread into the next Jaw. Slide Jaw #3 with the same procedure as Jaw #2.
4. 5. The Tailstock Quill is locked in place with the Tailstock Quill Fix Holder (146). Turn it clockwise to lock the Quill in place and counterclockwise to loosen it. Tighten the Nut (6) underneath the Quill to eliminate any play in the Quill. until they are securely holding the tool in place. Automatic Feeding Feed Control Wheel (84b) To adjust the Tailstock slightly to the right or left of center, loosen the Screw (197) on the bottom of the Tailstock. Adjust, then tighten.
Threading Dial The Threading Dial (65) is used to align and track the threads cut in a threading project. It can only be used when the Lathe is set to automatic feed (See previous section on Automatic Feeding). To set up the Threading Dial: b. Use the 5mm Hex Wrench (part of 311) to loosen the Plate (303) and the Threading Dial Body (68). c. Rotate both pieces so the Pinion (66) on the back side of the Threading Dial Body makes contact with the Lead Screw (129) (“Dial Engaged” in Figure 21, bottom photo).
Repeat each time before using a Crank in either direction when you need precise measurements. Operation Start up Note: Not following this start-up procedure will cause the Lathe to immediately shutdown. This is an overload protection feature for the circuit board and motor. 1. Begin with the Lathe unplugged. 2. Install the required Jaws (166 or 168) into the Chuck (2). 3. Set up the work area as needed for your project. You will need to: a. Secure the workpiece in place. b.
To Stop the Lathe Chuck Guard (201) Properly in place Safety Mechanism Pin (251) properly extended into the recess, allowing the lathe to operate. Figure 25 Safety Mechanism 1. Turn the Speed Control Knob (180) to 0. 2. Move the Forward-OFF-Reverse Switch to OFF. 3. Turn the Power Switch (178) OFF. 4. Unplug the Lathe when not in use. Rotating Plate (252) 5. The Chuck Guard (201) has a safety interlock and the Lathe will not operate unless the guard is properly in place.
Basic Operations Face Cutting WARNING: Make sure the Lathe power is off and the Lathe is unplugged before setting up a project or working near the Chuck (2). Following are some of the basic operations used with the Lathe. It is recommended that you become familiar with mini lathe techniques before using this tool. Consult books on the subject and/or web page resources for your project before using this tool. Figure 28 2.
Bevel Cutting Thread Size Gear Settings Gear Box Stud B C Threads Per Inch A 12 40 13 40 14 40 35 16 40 40 18 40 19 40 20 40 50 22 40 55 24 40 60 26 40 65 28 20 35 32 20 40 36 20 Threading Gears 38 20 By changing the gear set-up it is possible to cut any thread size. The factory set-up for Mini Lathe gears is as follows: 40 20 50 44 20 55 48 20 60 52 20 65 Figure 30 4. After adjusting the angle of the compound rest, you can make bevel cuts.
Automatic Feed and Threading Dial Once the gears are set up, you will need to engage the Threading Dial (65) so you can monitor the number of threads cut. Position C= 20T Position D= 80T Set up the Threading Dial as described in the SET UP section under Threading Dial. Set the direction for the lathe with the Forward/OFF/Reverse Switch. Turn the Power Switch on (the switch will light up).
Maintenance And Servicing Procedures not specifically explained in this manual must be performed only by a qualified technician. Belt Inspection and Tensioning 1. Remove belt cover, if equipped. 2. Examine belt for cracks, tears in the backing, or other damage. Replace belt if damaged according to steps below: a. Loosen the motor mounting bolts and slide the motor towards the other pulley as far as possible.
bolts and moving the motor towards the other pulley very slightly. Secure motor mounting bolts and retest tension. 4. Compound Rest A (108) Gib Screws (106) and Nuts (98) Cross Slide (100) Before use, replace belt cover if equipped. Gib Adjustments Compound Rest A (108) Gib (94) Gib (107) Gib Screws (99) and Nuts (98) Figure 32 Cross Slide (100) To make the adjustment: Gib (94) Compound Rest Crank (86B) 1. Unplug the Lathe. 2.
3. Place the dead center in the Tailstock. 4. Attach a Lathe Dog (part of SKU 3448 sold separately) the to 6” piece from step 1 and mount between centers. 5. Turn approximately 0.010” off of the diameter of the mounted workpiece. 6. Measure the workpiece with a micrometer at the Tailstock end and the Chuck end. Divide any difference by two. If it is thicker at the Chuck (2) end, move the tailstock away from you by the resulting amount.
Replacing the Fuse The Fuse (314) is located in the Fuse Holder (179) on the Control Panel (122). The Fuse Holder is spring fitted. Fuse Holder (179) Control Panel To remove Fuse Holder (179) Press down, then turn counterclockwise. (122) Fuse (314) Figure 34 1. Fuse Holder (179) Fuse Holder Socket To Remove the Fuse Holder: a. Insert a flathead screwdriver (sold separately) into the slot in the Fuse Holder. b. Press down and turn counterclockwise 1/4 turn. c. Release pressure.
Troubleshooting Problem Possible Causes Likely Solutions Motor and Electrical 1. Check that cord is plugged in. 2. Check power at outlet. If outlet is unpowered, turn off tool and check circuit breaker. If breaker is tripped, make sure circuit is right capacity for tool and circuit has no other loads. 3. Check for short, replace fuse (see Maintenance 3. Fuse has blown. section of this manual). 4. Chuck Guard safety interlock not 4. Rotate Pin (251) so it seats in Plate (252). in place. 5.
Problem Overheating. Possible Causes Likely Solutions 1. Motor overloaded. 2. 3. 4. 5. 6. 7. 1. Reduce load on motor. Loosen drive Belt (see Maintenance section of this manual). Forcing machine to work too fast. 2. Allow machine to work at its own rate. Accessory dull or damaged. 3. Keep cutting accessories sharp. Replace as needed. Incorrect RPM or feed rate. 4. Check that RPM feed rate chart for appropriate rates for operation. Gear setup is too tight, gears 5.
Problem Possible Causes Difficulty moving 1. Debris jammed around Gibs. Cranks of Cross Slide, Compound 2. Gibs adjusted too tight. Slide and/or Carriage Handwheel. 3. Bedways need lubrication. Cutting Tool 1. Tool Post (112) too loose. or machine components vibrate 2. Cutting tool jutting too far out of excessively during Tool Post or not secure. operation. Finished piece uneven from one end to the other. Difficulty moving Chuck Jaws. Carriage will not feed. Likely Solutions 1.
PARTS LIST Part 1 2 3 4 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 Description Bed way Chuck Spindle Stud M6 x 25 Nut M6 Key 5 x 40 Key 4 x 8 Set Screw M5 x 12 Cover Ball bearing 80206 Spacer Headstock casting H/L gear 21T/29T Spacer Spur gear 45T Nut M27 x 1.
Part 125 126 127 128 129 131 133 134 135 136 137 138 139 140 141 142 143 144 145 146 148 150 151 152 153 157* 158* 159* 160* 161* 162* 163* 164* 165* 166* 167* 168* 170 171 172 173 174 175 176 177 178 179 180 181 182 184 185 186 187 188 190 191 192 193 Description Rubber foot Chip tray Bracket Key M3 x 16 Lead screw Bracket Screw M3 x 10 Rack Clamp plate Washer M10 Screw M5 x 16 Tailstock Tailstock screw Bracket Screw M4 x 10 Tailstock quill Live Center Stud M8 x 40 Clamp Tailstock Quill Fix Holder Pulley
ASSEMBLY DIAGRAM REV 10b Page 34 For technical questions, please call 1-800-444-3353.
ASSEMBLY DIAGRAM (cONTINUED) b a Record Product’s Serial Number Here: Note: If product has no serial number, record month and year of purchase instead. Note: Some parts are listed and shown for illustration purposes only, and are not available individually as replacement parts. REV 10b SKU 93212 For technical questions, please call 1-800-444-3353.
WIRING DIAGRAM FC250BJ/110V CONTROLLER DC Output AC Input SAFETY SWITCH FUSE Rev F/O/R SWITCH Off POTENTIOMETER For Black POWER CORD White MOTOR POWER SWITCH REV 10b Page 36 For technical questions, please call 1-800-444-3353.
Limited 1 year / 90 Day warranty Harbor Freight Tools Co. makes every effort to assure that its products meet high quality and durability standards, and warrants to the original purchaser that for a period of ninety days from date of purchase that the engine/motor, the belts (if so equipped), and the blades (if so equipped) are free of defects in materials and workmanship.