Clausing-Colchester 13" All-Geared Head Lathe Manual PDF (EN)

CLAUSING-COLCHESTER 13” ALL-GEARED HEAD LATHES INTRODUCTION The Clausing-Colchester Machines are the result of almost half-a-century of concentration on the manufacture of lathes. The keynote of Clausing-Colchester machines is efficiency combined with simplicity. Our lathes are to be found working in all corners of the world and while essentially precision tools intended for the production of accurate work pieces; their simple design, robust construction and simplified controls make them very suitable for tooling for production work. All castings are naturally aged for at least six months to avoid any possible future distortion.

Jigs and special purpose machines ate used extensively in our manufacturing operations to ensure interchangeability of components, and care is taken in all processes in alt departments to ensured your satisfaction. This Manual supplies specific information relative to the Clausing-Colchester 13" Swing Lathes. A thorough understanding of the information contained in this handbook will aid in securing the most satisfactory operating results from your machine. At the time of issue, this handbook is completely up to date however improvements in design are continuously being made and it is possible that some information included in this book may vary from the machine delivered to you.

This indicates that the design changes have been so that the machine will better fulfill you needs, and we therefore reserve the right to alter the design or specification at any time without notice.

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LEVERS Threads per Inch Sliding Feed in Inches – Surfacing Half Sliding D B 112 104 96 92 88 80 76 72 64 .0017 .0018 .0019 .002 .0022 .0024 .0025 .0027 .003 C B 56 52 48 46 44 40 38 36 32 .0033 .0035 .0038 .004 .0043 .0047 .005 .0053 .006 D A 28 26 24 23 22 20 19 18 16 When Using 36 Driver Gear .0065 .007 .0075 .008 .0085 .0095 .010 .0105 .012 C A 14 13 12 11½ 11 10 9 ½ 9 8 .013 .014 .015 .016 .017 .019 .020 .021 .024 C A 7 6 ½ 6 5 ¾ 5 ½ 5 4 ¾ 4 ½ 4 .027 .029 .031 .032 .035 .038 .040 .042 .048 Fill with Shell Tellus Oil 33 to Mark on Sight Glass Oil obtainable from Shell Oil Companies throughout the World

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QUICK CHANGE FEED BOX Back to Index QUICK CHANGE FEED BOX The feed box forms a totally enclosed oil bath and provides 45 thread pitches and 45 feeds (as shown on the Screw Cutting and Feed Chart). Changes are accomplished, without any wheel changes being necessary, through a train of heat treated gears carried on high tensile heat treated splined shafts running in phosphor bronze bearings. the tumbler arm removed and the from cover taken off, but in case it is necessary to take down the tumbler shaft the following sequence of operations is recommended: Removal of Tumbler Shaft 1. Drain oil. 2. Remove Tumbler Arm plug. 3. Take out 1/4" grub screw. 4. Release grip of arm and remove. 5.

Remove front cover. 6. Remove tumbler gear. 7. Remove circlip. 8. Remove three 3/16" Cap screws in flanged bearing The feed box, while simple, is very effective and robust, and is controlled by means of three selection levers at the. front of the box. A fourth lever operates the leadscrew disengagement. Change wheels for cutting Metric pitches are only furnished at extra cost. Should be removal of any part of the feed box become necessary, the dismantling procedure will be clear if the oil is drained, 9. Slide shaft out in direction of tailstock. 10. Withdraw flanged bearing. 11. Remove tumbler bearing. Formula to obtain Gears for special threads

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SADDLE SADDLE The cross slide is radially graduated 360° for easy and accurate setting of the compound slide. A 24-tooth gear and dial indicator for screwcutting is fitted as standard, and is clearly visible from the natural operating position. The dial has 4 numbered divisions and 4 sub- divisions. To cut an even number of threads such as 12 T.P.I, the leadscrew may be engaged at any division on the dial, and for an odd number of threads, such as 13 T.P.I., the leadscrew must only be engaged at numbered divisions. To cut fractional threads such as 11 1/2 T.P.I, the leadscrew must be engaged only at division 1 on the dial. The dial indicator cannot be used for metric threads.

For these the nut is closed on the leadscrew, and the machine reversed by means of a finger tip reversing switch, mounted through the main control lever on the headstock, after each cut and tool withdrawal, bringing the tool back to starting point, the nut remaining engaged until the thread is completed. The switch is only supplied as extra equipment. The Saddle, of adequate proportions, mounted on vee and flat surfaces on the bed, is of the American Wing type on the straight bed machines and fitted with a very robust compound slide. The Saddle is secured to the bed by means of keeps in front and rear and can be locked on the bed at any position. All surfaces are precision machined.

Large diameter micrometer dials reading in .001" are fitted to both slides and can be set to zero and clamped for easy operation. Operating screws and slides are covered in all positions. A standard American pillar toolpost is fitted, but special and automatic indexing square turret toolposts can be accommodated and fitted at extra cost. When the Clausing-Colchester Coolant unit is ordered, the coolant supply pipe is bolted to the back of the carriage at the tailstock end, and moves along the bed with the carriage. The supply pipe is only furnished with the coolant unit.

The standard tool size for the American Toolpost is 9/16" X 1 1/8" APRON Back to Index The apron is a double-walled casting accurately machined and all shafts are arranged to have two bearing points. Feed and screwcutting controls are inter-locked to prevent simultaneous engagement and longitudinal and cross feeds are engaged by a positive single lever control action. Power for both longitudinal and cross feeds is taken from a separate shaft incorporating a simple slipping clutch arrangement at the feed box end which effectively guards against possible damage through careless operation and is equally effective in taking care of the heaviest cuts.

Similarly when screwcutting, a shear pin device in the gear train obviates damage, the pin being easily replaced by first removing the gear, and then the serrated sleeve from the shaft. This will allow the broken pin to be tapped out of the sleeve from the opposite side to the serrations, also if the shaft is revolved until the broken pin in it comes opposite the slot in the housing, it can be knocked straight through and will then drop out through the housing slot. The new pin can then be inserted.

Shear Pin device The precision leadscrew (6TPI ACME) is used for screw cutting only and the whole apron arrangement is effectively guarded to comply with Factory Satety regulations and requirements. Direction operating instructions are clearly shown on the metal plates on the apron.

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