Harbor Freight Tools 1_1/2 HP Milling/Drilling Machine Product manual
Contents
1. MILLING DRILLING MACHINE ITEM 33686 INSTRUCTION MANUAL DISTRIBUTED BY HARBOR FREIGHT TOOLS 3491 MISSION OAKS BLVD CAMARILLO CA 93011 6010 aniy Lu 4901 Pex aaen IPuipnii5uo 103 I 9198 Jea zgoc f UDINIO IA UNA 824M lpuer lqer e i lt gt 1948 SS019 104 YOINID JEIG YUM I uAA lpueH aiqey AD iN lt D uonesado Buidde 10 o 7 i YOUMS 9LNDAZ i 001g uonisoq 19S YNM poy papenpein Pue pee 009 Ou UNA HOR 4907 Pot pueH pidey Thank you tor buying the 33686 Milling Orilling Machine properly cared for and operated this machi ne can provita you with years of accurate service isase read this manual carefully before using your machine SPECIFICATION mo ITEM 33686 ITEM 33686 Drilling capacity 31 75mm 1 1 4 7 24 23mm 7 8 ee capacity sn 3 End mill capacity 20mm 3 4 Swing 405mm 15 7 8 Max distance spindle nose to table 457mm 18 Spindie taper M T 3 R 8 7 24 Spindle stroke 130mm 5 Diameter of Spindle sleeve 75mm 3 gi E Head swivel Diameter of column 115mm 4 1 2 Overall height w o stand 1100mm 43 1 2 Machine stand height Length 1156mm 45 1 2 1010mm 39 3 4 1 1 2hp 2HP Forward and backward travel of Table 175mm 7 178mm 7 Right and left trava cf tabla 500mm 19 3 4 610mm 24 Working area of table 730mnY 240mm2. ise and the working depth also can be adjusted by the limit switch Electric switch will be installed acc ording to your requirement and you must pay the cost only li 14 SPECIFICATION OF T SOLT The size of T Solt on table as Fig 6 ITEM 33686 Figure 6 15 TROUBLE SHOOTING 1 No running after switch on a Main switch interruption while volts irregular Adjust input voltage and draw back the main switch b Break down of fuse in switch box Replace with new cne c In caza c too much current the overload relay jumps away automatically Press the overload rel ay and it will return to the correct position REV 07 06 2 Motor Overheat and No Power a Overload Decrease the load of feed i b Lower voltage Adjust to accurate voltage c Spoiled contact point of magnetic switch Replace with new one d Breakdown of overload relay Connect it or replace with new one e Motor is poor Replace with new one f Break down of fuse or poor contact with wire it is easily to spoil rnotor while short circuited Swite h off power source at once and replace fuse with new one g The tension of pulley V belt too tight Adjust for proper tension of V Belt h If this machine with the tapping attachment there is an aid plum screw fix on the motor mount in order to avoid the motor pulleys shake while turning 3 The temperature of spindle bearing is too hot a Grease is insufficient Fill the grease b T
3. 281 4 81 2 806mm 241 31 3 4 X9 1 2 Gross weight 340 kgs 660 Ibs 345kgs Measurament 29 3 Cuft f f a r A vi i vi 6 PRECAUTION FOR OPERATION Check all parts for proper condition before operation if normal safety precautions are noticed carefully this machine can provide you withstanding of accurate service 1 Before Operation a Fill the lubricant b In order to keep the accurate precision the table must be free from dust and oil deposits c Check to see that the tools are correctly set and the workpiece is set firmly d Be sure the speed is not set too fast e Be sure everything is ready before use 2 After Operation a Turn off the electric switch b Turn down the tools c Clean the machine and coat it with lubricant d Cover the machine with cloth to keep out the dust 9 Adjustment of Head a To raise and lower the head loosen the two heavy duty head lock nuts shown in Fig 1 Use the left side head handle to raise and lower the head on its rack and eee mechanism When the de sired height is reached tighten the bolts to avoid vibration e La A b Head may be rotated 360 by loosening the same bolts mentioned above Adjust the head to the desired angle then fix the heavy duty head locknuts You may have to re tignten lock nuts if the machine is used on a continual basis SS Tight Loose Y e ae Z E ___ESHW amp CA Lock Bolt With ane ars a
4. H Rack Sleeve Z f lt aN Spring Base a sai Worm Gear S lt SS l EOS A Handle Rod i Feed Handle Wheel Set Position Block l Figure 2 4 Preparing for Drilling see fig 2 Except addition power feed system Turn of the knab make loose the taper body of worm gear and spring base Then we decide spindle stroke setting the positive depth stop gauge for drilling blind hole or Free state for pass hole 5 Preparing for Milling see fig 2 Except addition power feed system a Adjust the positive depth stop gauge to highest point position b Turn tight of the knob be use to taper friction force coupling the worm gear ane base Then turning the handle wheel by micro set the sprindle of work piece machming height c Lock the rack sieeve at the desired height with fixed bolt 7 ADJUSTING TABLE SLACK AND COMPENSATE FOR WEAR see fig 3 1 Your machine is equipped with Jib strip adjustment to compensate for wear and excess slack on cr oss and longitudinal travel 2 Clockwise rotation the jib strip bolt with a big screw for excess slack otherwise a little counter clock wise if too tight 3 Adjusf the jib strip bolt until feel a slingt drag when shifting the table 0 pote a N 8 CLAMPING TABLE BASE AND MACHINE BASE See Fig 3 1 When milling longitudinal feed it is advisable to lock the cross feed table travel to insure the accura cy of your work To do this tighten the small leat screw located on the
5. SKU 33686 1 Chuck Arbor Bolt 2 ELT Pulley Lock Nut 3 Spindle Pulley 4 Belt bottom Cover 5 Dust Cover 6 Spindie Taper Sleeve 7 Ball Bearing 6009 ZZ 8 Bearing Spacer 9 C Retainer Ring 10 C Retainer Ring 11 Head Body 12 Rubber Flange 13 Feed Base 14 Lock Nuts 15 Taper Roller Bearing 302061 16 Rack Sleeve 17 Spindle Shaft 18 Taper Roller Bearing E3020671 19 Bearing Cap 20 Cutter Arbor 21 Chuck Arbor 22 Grip 23 Retainer Ring 24 Handie Rod 25 Fixed Tight Collar 26 Fixed Tight Collar Thread 27 Screw Key 28 Lift Knob 29 Handie Rod 30 Knob 31 Micro Adjusting indicator 32 Worm Cover 33 Ball Bearing 6202Z 34 Worm Shaft 35 Lock Handle 36 Leaf Screw 37 Head Body Fix Bolt 38 Graduated Rod 39 Graduated Dial 40 Switch 41 Name Plate 42 Worm Shaft 43 Angular Gear Parts List oa QU Ah pon ett OD ON ot NA ot ps pt p q pa pr pe I a pa 44 Shaft 45 Compression Spring 46 vibration Proof Pole 47 Motor Mount 48 Motor 49 Punch Key 50 Belt Cover 51 Motor Pulley 52 V Belt B813 53 Ball Bearing 62042 54 Inter Pulley SS V Belt B1016 1041 S6 Inter Pulley Shaft 57 Speed Change Inter Pulley Base 58 Clip Plate 59 Rubber Collar 60 Screw With Plumb Knob 61 Cutter 62 Set Distance Nut 63 Set Position Block 64 Lock Nut 65 Support Base 66 Handle 67 Front Cover Plate 68 Push Switch Protectlon Plece 69 PU Down with stand 70 Limit Plate 71 Sp
6. right side of the table base 2 To tighten the longitudinal feed travel of the table for cross feed milliing tighten the two small leaf sc rew on the front of the table base 3 Adjustable travel stops are provided on the front of the table for control of longitudinal travel and the desired milling length Fixed Block Jib strip Leaf Screw Leaf Screw Jio strip Bolt Jib Strip Bolt Jib strip Cross feeding Longitudinal feeding Figure 3 A Cabin a seta w q aM IR bet tT sas s ata s R e A ye se Y y 9 SPEED CHANGING AND ADJUST BELT Step See Fig 4 1 Turn power off 2 Open belt cover by releasing side latches step see a b c 3 Loosen motor mount leaf screw 4 Push motor in order to loosen belts head side of motor mount is set fixed two motors ear side with motor screw to tighten of loosen of belts 5 Loosen two screws of base for speed change inter pulley that also adjust the location of base for speed change inter pulley 6 Select the suitable R P M from speed charts of Fig 5 Then place the belts on the desired pulley steps 7 Tighten two screws of base for Speed change pulley and the bolt of motor mount lock 8 Cover the belt cover with counter step 2 after turn power on Motor 12s 30MM Spindle shaft Tae EEK SS 4 Figure 5 10 TO CHANGE TOOLS 1 Removing Face Mill or Drill Chuck Arbor Loosen the arbor bolt see fig 4 at the top of the spindle sh
7. 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 145 146 147 148 149 150 151 152 153 154 155 Body Gib Strip Vertical Shaft Shaft Bottom Rack Shaft Cover Jib Strip Bolt Leaf Screw Movable Fixed Block Table Down Nut Center Base Anti dust Press Plate Anti dust Plate Anti dust Press Plate Left Flange Table Upper Nut Table Screw Right Flange Table Gib Strip Table Fixed Block Movable Fixed Ring Hexagon Head Bolt Same3 131 Hexagon Socket Head Screw Hexagon Same3 145 Cone Pin Indicated Zero With Screw Locking Screw Hexagon Head Bolt Spring Washer Hexagon Socket Head Screw Hexagon Socket Head Screw Hexagon Socket Head Screw Hexagon Socket Head Screw Adjusting Plate O N A ANH o N N N N O REV 06 02 08 05 10 05 For technical questions please call 1 800 444 3353 Page 10 Parts Diagram Y 99 gt 42 w i 19 2 3 20 aa REV 06 02 11 03 08 05 10 05 SKU 33686 For technical questions please call 1 800 444 3353 Page 11 Parts Diagram AT AN8 pz sia go 116 N 1 i 367 117 a Ny lt MW ag 48 REV 06 02 10 05 SKU 33686 For technical questions please call 1 800 444 3353 Page 12 COWL k T mN 11 2002 B1 28PM PI bu ibs QUE ALOI 11 JO OXA I9A093SI OIOI_I QNOp JO elja IDA03 Sf BI UA PELA Ta
8. aft approximately 2 turns with a wrencn Rap the top of the arbor bolt with a mallet l After taper has been broken loose holding chuck arbor on hand and turn detach the arbor bolt with the other hand 2 To Install Face Mill or Cutter Arbor Insert cutter and cutter arbor into the taper of spindle Tighten arbor bolt detach securely but do not ove tighten 3 Removing Taper Drills a Turn down the arbor bolt and insert the taper drill into the spindle shaft b Turn the spincle sieevo down until the cblong hole in the rack sleeve appears Line up this hole with the hole in the spindle Insert key punch key through holes and strike lightly with a mallet Th is will force the taper drill out 11 ORDERING REPLACEMENT PARTS Complete parts list is attached If parts are needed contact your local distributor or our factory In order to use mill cutters you will need a R 8 collet holder You can order this from Harbor Freight Tools item 46004 We also sell a 4 PC collet set item 46002 12 EXTRA TOOLING AND ACCESSORIES Each of machine is equipped with a MT 3 spindle taper or a R 3 spindle taper examples below Co ntact your local distributor or a major cutting tool distributor to obtain any of these accessories Taper Drills Reamers End Mills Cutter Arbor Taps Collets Adapters and Sleeves 13 TAPPING EQUIPMENT This machine can be equipped with an electric switch for tapping operation clockwise or counterclockw
9. he spindle bearing is fixed too tight Turning with no speed and feel the tightness with hand c Turning with high speed for a long time Turn it to lightly cutting 4 Lack of power with main spindle revolving a The tension of V belt too ioose Adjust for proper tension of V belt ni b Motor has burned out Change a new motor c Fuse has burned out Replace with new one 5 Table travel has not balanced a The gap of spindle taper too Wide Adjust bolt in proper b Loosening of leaf bolt Turn and fasian in place c Feed too deep Decrease depth of feed 6 Shake of spindle and roughness of working suriace has taken place during pertornance a The gap of spindle bearing too wide Adjust the gap in proper cr replase bearing with new one b Spindle loosening up and down Make wo of inner bearing covers on the top tight each other Do not overtighten two inner bearing covers with the taper bearing it is OKas long as no gap between them _ c The gap of taper sliding plate too Wide Adjust the tension of bolt in proper d Loosening of chuck Fasten chuck e Cutter is dull Resharpen it f Workpiece has not hold firmly Be sure to tighten workpiece 7 Micro feed does not work smoothly a Loosening of clutch Be sure to tighten it b Worm and worm shaft has worn out Replace with new one c Loosening of handwheel fixed screw Be sure to tighten it 8 Without accuracy in performance a I
10. mbalance of heavy workpiece Must be considerate of the principle of balancewhile holding workpiece b Often use of hammer to strie workpiece Forbidden to use hammer to strike workpiece c Unaccurate horizontal table Check and maintain table for keeping accurate horizontal after a pe riod of use 16 MAINTAINIING That s easier to keep machine in good condition or best performance by means of maintaining if at any time than remedy if after it is out of order 1 Daily Maintenance by operator a Fill the lubricant before starting machine everyday b If the temperature of spindle caused overheating or strange noise stop machine immediately to check it for keeping accurate perfcrmance c Keep work area clean release vise cutter workpiece from table switch off power source take _ chip or dust away from machine and follow instructions lubricanting or coating rust proof cil be tore leaving i 2 Weekly Maintenance a Clean and coat the cross leading sorew with oil b Check to see it sliding surface and turning parts lack of lubricant If the libricant is Msufficant fill it 3 Monthly Maintenance a Adjust the accurate gap of slide both on cross and longitudinal feed b Lubricate bearing worm and worm shaft to avoid wear pe S 4 Yearly Maintenance a Adjust table to horizontal position for maintenance of accuracy b Check electric cord plugs switches at least once a year to avoid loosening or wearing Ba
11. ring Cover 72 Spring 73 Spring Base 74 Pinion Shaft 75 Worm Gear 76 Feed Box 77 Buffer Spring 78 Spring base 79 Terminal 80 Hexagon Head Bolt 81 Washer 82 Cross Recess Round Head Screw 83 Hexagon Head Bolt 84 Hexagon Nut 85 Capacitor Housing Pa A pa 34 pd pe oan N pd pl pd pd fai UY w Q ps pt ps y pal pd pd p pee Bw REV 06 02 11 03 For technical questions please call 1 800 444 3353 Page 9 Parts List continued 85 Cone Pin 86 LockWasher 87 Cross Recess Round Head Screw 88 Spring Pin 89 Hexagon Nut 90 Key 91 Hexagon Socket Head Screw 92 Hexagon Socket Headless Screw 93 Hexagon Socket Headless Screw 94 Hexagon Socket Head Screw 95 C Retainer Ring 96 Hexagon Nut 97 Washer 98 Cross Recess Round Head Screw 99 Hexagon Socket Headless Screw 100 O Retainer Ring 101 Hexagon Socket Head Screw 102 Hexagon Head Screw 103 Hexagon Head Screw 104 Hexagon Nut 105 Key 106 Hexagon Head Bolt 107 Washer 108 Outline Bush 109 Cross Recess Round Head Screw 110 Cross Recess Round Head Screw 111 Cross Recess Round Head Screw 112 Washer 113 Cross Recess Round Head Screw 114 Lock Bolt with Knob 115 Feed Handle Wheel 116 Table Handle Wheel 117 Dial Handle 118 Thrust Bearing S1103 119 Square Flange 120 Feeding Plate Screw SKU 33686 NQ 0 BASH ANANDNNMHANAANHANAHNHAWNHHHNWH 121 122 123 124 125 126
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