CLICK HERE TO VIEW / BUY CLARKE SUPPLIES FROM M&P 300mm VARIABLE SPEED METAL LATHE Model No.
SPECIFICATIONS Motor ..................................................................... 230VAC, 50Hz, 1 Phase Power Rating ............................................... 300Watts Current Rating ............................................. 5Amps Distance Between Dead Centres ...................... 300mm Centre Height ...................................................... 90mm Max. Work Diameter ............................................ 180mm Spindle Bore ..............................................
TABLE OF CONTENTS PAGE Specifications ....................................................................................... 2 Spare Parts & Service .......................................................................... 2 Guarantee ............................................................................................ 5 General Safety Precautions .............................................................. 6 Additional Safety Rules for Metal Lathes ..........................................
INTRODUCTION Thank you for purchasing this CLARKE 300mm Metal Lathe. The compact rugged construction and screw cutting capabilities, makes the CL300M ideal for model makers etc., both professional and DIY alike. The Machine is capable of turning up to a maximum diameter of 180mm and an overall length of 300mm. It is further capable of producing short tapers and Imperial threads, both left and right hand.
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 23 24 25 1 2 3 4 5 6 7 8 9 Fig. 1 22 10 21 11 26 20 19 18 17 15 16 14 13 12 28 1 27 Rear view of headstock 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. Headstock Spindle Flange Chuck Guard 3- Jaw Chuck Tool Post Cross-Slide Compound Slide Tailstock Centre Tailstock Tailstock Securing Nut Bed R.H. Leadscrew Bearing Compound Slide Feed Handle Thread Dial Indicator LEGEND 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28.
THE HEADSTOCK The motor provides a direct drive to the Spindle via an internal tooth type belt. Spindle speed is variable, and is regulated by the Speed Control Knob (23), located on the main control panel. The spindle, is provided with an internal No.3 Morse taper to accommodate a centre for use with a face plate or turning clamp, (See ‘Accessories’ on page 24). The Chuck Guard (3), is an essential component and is mounted on a pin which is secured to the headstock by two screws.
THE SADDLE The Saddle carries the Cross-Slide (6), on to which is mounted the Compound Slide (7) with Tool Post (5), allowing intricate and delicate operations to be performed. It may be driven by the Leadscrew, via a Drive Nut, to provide automatic feed when the Auto Feed lever (15), mounted on the Apron (17), is operated.
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. The following loose items are to be found in the packing case. Fig. 4 1. 4 x Rubber Feet.* 9 2. 4 x M6 Pan Head Scews.* 4 11 3. 4 x Hex. Keys. 4. 1 x Chuck Key. 3 5. 1x Plastic Oil Container.* 8 6. 1 x Spare Fuse - 2amp, glass type.* 7.
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.
We strongly recommend that the machine is bolted firmly to a strong workbench using the tapped holes used to secure the feet to the lathe. This is to provide added stability and consequently, additional safety. To do this, remove the four M6 screws which secure the rubber feet and chip tray to the machine (if already fitted) and discard the feet.
Check that all components are still secure and working freely and correctly. Check also to ensure the mountings are secure. Repeat the procedure at the HIGH range setting Should any adjustments be necessary, refer to the appropriate section under Settings and Adjustments. NOTE: When changing from HIGH to LOW range, it may be necessary to turn the spindle by hand, in order for the gears to mesh correctly. CAUTION: NEVER attempt to change from HIGH to LOW range with the machine running. B.
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. Fig 6 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. Have drawings or a plan on hand together with any measuring instruments you may require, such as micrometers/ verniers/calipers etc.
It may be necessary to adjust the position of the compound slide or reposition the work in the chuck to guarantee that there is adequate clearance. Fig 7 When satisfied retract the cutting tool and wind the saddle away from the headstock, then wind the cutting tool up to the work, somewhere along the length to be cut, whilst rotating the work by hand, using the chuck. Continue to advance the cutting tool slowly, until it just touches the surface.
B. SIMPLE TURNING WITH POWER FEED The same basic setup is used as described above, except that, before starting, the Leadscrew F/N/R Lever (25) is set to the ‘Forward’ position and the Auto Feed Lever (15), is operated in order to drive the saddle. As mentioned previously, the rotational speed of the leadscrew, and hence the rate of feed of the tool, is dependant upon the gear configuration of the gear train. The feed rate for normal turning is considerably less than that used for screw cutting.
C. BEVEL CUTTING Fig 8 Bevel cutting involves the use of the compound slide, which is mounted on the cross-slide and set at right angles to it for all normal cutting operations. This is indicated by the zero mark, on the scale, (B, Fig. 8), lining up with the mark etched on the body of the cross-slide. To set the compound slide so that the cutting tool will cut a bevel, first retract the slide, until the two hex. socket head screws (A), are revealed as shown in Fig 8.
The general procedure for screwcutting is as follows: 1. Try to get as much distance from the chuck to the end of the proposed screw thread as possible, and if your design allows, cut a ‘run-off’ into the work which is of a smaller diameter than the root diameter of the proposed screw thread. Note, that for long threads it may be necessary to use ‘steady’s’ (see ‘Accessories’ on page 24). 2. Install the appropriate gears for the thread required, and correctly mount the cutting tool.
CHANGING GEARS FOR SCREWCUTTING The leadscrew is driven, via a gear train, by a gear on the spindle. The gear ratio will therefore determine the rotational speed of the leadscrew with relation to the spindle. i.e. one turn of the spindle will turn the leadscrew an amount determined by the gear ratio. By setting the gears to a known ratio, we can therefore produce threads to a known size, and as the leadscrew supplied produces Imperial threads, the known values will be in Threads Per Inch (TPI).
GEAR CHART FOR CUTTING IMPERIAL THREADS Threads Per Inch INDICATOR TABLE Gear A B C D 12 40 65 - 30 13 40 65 60 30 14 40 65 - 35 16 40 65 - 40 18 40 65 - 45 19 40 50 60 57 20 40 65 - 50 22 40 65 - 55 24 40 65 - 60 26 40 60 - 65 28 20 65 - 35 32 20 65 - 40 36 20 65 - 45 38 20 50 60 40 20 65 44 20 48 52 TPI SCALE 12 1,3,5,7 13 1 14 1,5 16 1~8 18 1,5 19 1 20 1,3,5,7 22 1,5 24 1~8 26 1,5 28 1,3,5,7 32 1~8
In order to change the gears, ensure the machine is switched OFF and disconnected from the mains supply. Remove the gear train cover which is secured with two hex. socket head screws. Gear A may be considered as the Driver, and Gear D as the Driven gear. When a Simple gear train is configured, as illustrated in Fig. A, page 19, the gear at B acts as an Idler and its size is therefore irrelevant - any convenient gear will suffice to connect A and D.
MAINTENANCE For maximum performance, it is essential that the lathe is properly maintained. BEFORE USE Always inspect before use. Any damage should be repaired and maladjustments rectified. Damage to machined surfaces should be repaired with an oil stone. Test by hand to ensure smooth operation of all parts before use. Inject a few drops of oil to the oilways at both leadscrew bearings (each end bracket) and once or twice during the day if used continuously.
To adjust the jib strip, to account for wear and ensure the slide moves evenly and smoothly, proceed as follows: 1. Slacken off all lock nuts and screw inthe jib screws evenly, i.e. use the same torque for each screw. The slide should be held firmly. Test by trying to turn the handle, but do not force it. Fig. 13 2. Screw out each jib screw by one quarter of a turn ONLY, and nip up the lock nuts 3. Test again, by turning the handle. The movement should be even and smooth along its complete length. 4.
ACCESSORIES A range of accessories is available from your Clarke dealer which extends the versatility of your machine. These are as follows: 1. Independant 4-Jaw Chuck 80mm dia. ................... Part No. . 7610721 2. Face Plate - 160mm dia. ............................................................. 7610723 3. Moving Steady . ........................................................................... 7610724 4. Fixed Steady ..............................................................................
EXTERNAL JAWS - 3-Jaw Chuck To change the jaws, insert the chuck key and open the jaws to their fullest extent. It will then be possible to remove each jaw in turn. Fig.14 Replace them with the external jaws, noting the following. The thread segments of the jaws are progressively ‘stepped’ as shown in fig 14. They are also numbered 1 to 3. This is to take into account the lead of the screwthread within the chuck. It is therefore necessary to assemble the jaws in the correct order.
PARTS LIST No.
Cont. No. Description 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 105 106 107 108 109 110 111 112 113 114 115 116 119 120 121 122 123 124 125 126 127 Qty Part No.
PARTS DIAGRAM 29
WIRING DIAGRAM 30
NOTES 31
