250mm (10 inch) VARIABLE SPEED METAL LATHE Model No. CL250M Part No.
SPECIFICATIONS Motor ..................................................................... 230VAC, 50Hz, 1 Phase Power Rating ............................................... 150Watts Current Rating ............................................. 5Amps Distance Between Dead Centres ...................... 250mm (10”) Centre Height ...................................................... 70mm Max. Work Diameter ............................................ 140mm Spindle Bore ........................................
TABLE OF CONTENTS PAGE Specifications ....................................................................................... 2 Declaration of Conformity ................................................................. 2 Guarantee ............................................................................................ 4 General Safety Precautions ............................................................... 5 Additional Safety Rules for Metal Lathes ..........................................
INTRODUCTION Thank you for purchasing this CLARKE 250mm Metal Lathe. The compact rugged construction and screw cutting capabilities, makes the CL250M ideal for model makers etc. The Machine is capable of turning up to a maximum diameter of 140mm and an overall length of 250mm. A full range of accessories is available from your Clarke dealer, so that the machine is capable of Milling, producing short tapers, and metric threads, both left and right hand. (see ‘Accessories’ for details).
GENERAL SAFETY PRECAUTIONS FOR OPERATING MACHINERY CAUTION As with all machinery, there are certain hazards involved with their operation and use. Exercising respect and caution will considerably lessen the risk of personal injury. However, if normal safety precautions are overlooked or ignored, personal injury to the operator or damage to machinery may result. 1. KNOW YOUR MACHINE. Read the manual carefully.
18. DO NOT STAND ON THE MACHINE. Serious injury could occur if the machine is tipped over. Do not store materials above or near the machine such that it is necessary to stand on the machine to get to them. 19. NEVER operate a machine when under the influence of alcohol, drugs or medication. 20. ALWAYS ENSURE THAT ADEQUATE LIGHTING is available. A minimum intensity of 300 lux should be provided. Ensure that lighting is placed so that you will not be working in your own shadow.
FEATURES FIG.1 THE HEADSTOCK The motor drives the Spindle via an internal tooth type belt. Spindle speed is variable, and is regulated by the Speed Control Knob. The spindle, is provided with an internal No.2 Morse taper to accommodate a centre for use with a drive dog assembly when turning between centres.(See ‘Accessories’) The Chuck Guard, is an essential component and must always be lowered into place when using the lathe. A microswitch prevents the lathe from operating should the Guard be raised.
The rotational speed of the lead screw, and hence the rate of feed of the cutting tool, is determined by the gear configuration. A Metric thread cutting kit, comprising a number of gear wheels, is available from your Clarke dealer (see Accessories). A chart, on the headstock, indicates the gear configuration for various thread sizes. The procedure for changing the gears is given in the literature accompanying the Thread Cutting Kit.
UNPACKING & PREPARING FOR USE On receipt, carefully unpack the lathe. Inspect to ensure that no damage was suffered in transit and all parts are accounted for. Should any damage be apparent, or parts are missing, please contact your Clarke dealer immediately. FIG.2 The following loose items are to be found in the packing case...Item numbers are those shown in the parts list on page 21 900. 4 x Hex. Keys. 2, 3, 4 & 6mm 906. 2 x ‘C’ Spanners 901. Double Open Ended Spanner 5.5x7mm 907. 1 x Chuck Key.
INSTALLATION CAUTION! DO NOT ATTEMPT TO USE THE MACHINE UNTIL INSTALLATION IS COMPLETED, AND ALL PRELIMINARY CHECKS HAVE BEEN MADE IN ACCORDANCE WITH THIS MANUAL. A. ELECTRICAL CONNECTIONS Connect the mains lead to a standard, 230 Volt (50Hz) electrical supply through an approved 13 amp BS 1363 plug, or a suitably fused isolator switch.
B. MOUNTING THE LATHE The lathe should be mounted on a strong, heavy workbench, of sufficient height so that you do not need to bend your back to perform normal operations. Take the necessary precautions when moving the lathe considering its’ weight. Assistance will be required. Ensure the location is adequately lit and that you will not be working in your own shadow. We strongly recommend that the machine is bolted firmly to a strong workbench using the 3, M5 tapped holes provided, FIG.
a. Turn the ‘Emergency Stop so that it springs out. b. Turn the ‘Forward/OFF/Reverse’ switch to Forward or Reverse. c. Turn the ‘Power Drive’ control knob, which drives the Leadscrew, to the ‘HAND’ position.......NO Drive. IMPORTANT: This should ALWAYS be a deliberate,conscious action. d. Turn the ‘Spindle Speed Control’ knob fully anticlockwise until it clicks into the OFF position. e.
CAUTION: ALWAYS turn the machine OFF at both the Variable Speed Control and the Forward/Off/ Reverse switch BEFORE attempting to change any settings or make any adjustments. OPERATION A. SIMPLE TURNING Before starting the machine, as described above, it is imperative that the setup for the type of work to be carried out is fully checked. The following notes are guidelines as to how to set up the lathe in order to carry out a simple turning operation. ALWAYS plan your work.
To check to ensure the tip is at the correct height, position the tool so that the tip is almost touching the point of the tailstock centre. They should coincide. If necessary make adjustments using shims, grind down the cutting tool tip or select another tool. FIG.6 Mark the surface of the work at the point where the cut is to end, i.e.
Whenever you use the scale, as an indicator, to advance the cross-slide or saddle, ALWAYS use this procedure to align the marks. This is to take into account backlash and other clearances in the gearing and slides etc. Continue to turn the handle an amount equivalent to your desired depth of cut. NOTE: We recommend that for rough cutting, you do not exceed 0.010” as your depth of cut. The setup is now complete to begin your cutting operation, but before starting, check the position of: a. Power Drive Knob.
5. Retract the tool one or two complete turns on the cross-slide feed, then wind the saddle so that the tool is at the start point once again. Advance the tool the same number of turns, plus the depth of cut, and when ready, turn the Power Drive Control knob clockwise to engage the clutch again and procede to take another cut. MAINTENANCE For maximum performance, it is essential that the lathe is properly maintained. BEFORE USE Always inspect before use.
SETTINGS AND ADJUSTMENTS Occasionally, it may be necessary to readjust various components in order to maintain optimum performance. The adjustments that may be performed are as follows: A. CROSS-SLIDE AND SADDLE ADJUSTMENTS The Cross-Slide and Saddle are mounted on dovetail slides,illustrated in FIG. 10. Between the sloping surfaces on one side of the dovetail, a ‘jib strip’ is inserted, which may be tightened against the dovetail under the influence of adjuster, or ’jib’ screws.
ACCESSORIES A range of accessories is available from your Clarke dealer which extends the versatility of your machine. A sample of these is as follows: P/No. 7610721 1. Independant 4-Jaw Chuck 80mm dia. .............. ............................. P/No. 7610742 2. Face Plate - 115mm dia.................................... P/No. 7610746 3. Moving Steady ................................................................................ P/No. 7610745 4. Fixed Steady .........................................
SPARE PARTS DIAGRAM 19
SPARE PARTS LIST No: Description No: Description Qty Part No: Qty Part No: 1 Running Gear Cover 1 SG250M001 40 Key 6*36 1 SG250M040 2 Cap Screw M4*8 9 SG250M002 41 Spindle 1 SG250M041 3 Cap Screw M4*12 6 SG250M003 42 Key 1 SG250M042 4 Hinge 2 SG250M004 43 Nut M6 3 SG250M043 5 Washer 4 SG250M005 44 Screw M6*25 3 SG250M044 6 Nut M4 4 SG250M006 45 Chuck Flange 1 SG250M045 7 Cantilever 1 SG250M007 46 Round Cap Screw M4*12 11 SG250M046 8 Nut M6 2 SG250
Cont: No: Description No: Description Qty Part No: Qty Part No: 80 Washer 3 SG250M080 119 PC Board Box 1 SG250M119 81 Change Gear Z=72 1 SG250M081 120 Screw 4 SG250M120 82 Change Gear Z=19 1 SG250M082 121 Micro Switch 1 SG250M121 83 Change Gear Z=76 1 SG250M083 122 Screw 2 SG250M122 84 Change Gear Z=24 1 SG250M084 123 Power Cord With Plug 1 SG250M123 85 Gear Sleeve 2 SG250M085 124 Label 1 SG250M124 86 Gear Shaft 2 SG250M086 125 Switch Label 1 SG250M
WIRING DIAGRAM SPARE PARTS & SERVICE For Spare Parts and Service, please contact your nearest dealer, or CLARKE International, on one of the following numbers. PARTS & SERVICE TEL: 020 8988 7400 PARTS & SERVICE FAX: 020 8558 3622 or e-mail as follows: PARTS: Parts@clarkeinternational.com SERVICE: Service@clarkeinternational.
