Colchester bantam mk2 manual

Model engineering club news Model Engineers' Workshop. News from advertisers in Our Magazines and Website. Magazine Locator. View All Topics. Community Sites. Model Flying Model Boats. Model Engineering Get Woodworking. Subscribe Now Great savings Delivered to your door. Renew Now Dont miss an issue! Renew your sub now. Back Issues. Rgds Simon. Internet Archive's 25th Anniversary Logo.

Search icon An illustration of a magnifying glass. User icon An illustration of a person's head and chest. Sign up Log in. Web icon An illustration of a computer application window Wayback Machine Texts icon An illustration of an open book. Books Video icon An illustration of two cells of a film strip. Video Audio icon An illustration of an audio speaker. Audio Software icon An illustration of a 3. Software Images icon An illustration of two photographs.

Images Donate icon An illustration of a heart shape Donate Ellipses icon An illustration of text ellipses. PDF Mar PDF Mar 1. Go to parent directory. Christen DAN Betriebsanleitung. Clausing 10in Operating Instructions, parts list. Clausing Colchesterinch-Geared-Lathe-Manual. Clausing-Colchester X 15 manual.

Colchester Capstan, tourelle revolver. Cortini C3 Manuale elettronica per filettature. Cortini C3 manuale uso e manutenzione. Are they accurate? Care is required when mounting new D1 accessories on the spindle nose - and it may be necessary, in order to achieve maximum grip, to re-set the Camlock studs within the backplate - it is essential to read the maker's instructions on this point if you are unsure of how to do it.

Even on this cheapest of Colchester lathes the spindle bearings were the expensive but super-accurate "Gamet" micron-precision type used on all the company's larger lathes; as all the gears were also hardened, honed and carried on multi-spine shafts the headstock has, as a consequence, a reputation for absolute reliability and only many years of heavy use--or clumsy mishandling of the gear change - is likely to cause problems.

Continued below: Colchester Bantam Mk. Because the motor was mounted externally, at the rear of the headstock, it is a comparatively simple matter to change it. However, if you intend to operate lathe from a now inexpensive and effective 1-phase to 3-phase variable-speed drive inverter, the 2-speed motor type will require a special high-voltage inverter; if you would like more information please email for up-to-date information. On the Eagle and Hawk models the standard electrical control was by a simple push-button, direct-on-line starter but with the option of a much more sophisticated and safe system that was standard on the Condor of a handle, supported by a bracket on the right-hand side of the apron, rotating a "third-rod" control shaft that passed beneath the apron and connected, via a drop link, to a reversing switch mounted behind a fascia plate between the stand legs.

If fitted, it is worth checking this mechanism for wear; the central, or "off" position of the handle was maintained by a bracket fastened to the right-hand face of the apron with a deep, spring-loaded, triangular-shaped indent; if this indent is broken, or rounded off, it is very easy for the operator to unintentionally push the handle over centre, and so cause the spindle to go into reverse. Problems with the electrical-reversing switch can sometimes be traced to play in the ball joints at each end of the vertical drop link, or rust forming on the two sliding plates on the exterior of the switch; these problems, though annoying, are easily corrected.

If the mechanical parts of the reversing mechanism are beyond repair, it is a simple matter to bypass the system and rewire the electrics to a conventional rotary-type reversing switch mounted on a bracket that allows the operator quick and easy access without moving from his normal working position. In fact, on models without the screwcutting gearbox, the electrical system was often arranged like this when new, the precise type of switchgear varying somewhat over the years.

Because they combine such a range of desirable features Bantams of all types are very sought after second-hand; if you have a machine in good condition, and maintain it carefully, it should retain its value indefinitely. On the changewheel models there was, unlike their contemporary Harrison competitors, no 3-speed leadscrew gearbox, instead a simple 2-speed gearbox was employed where a sliding double gear on the feed shaft could be moved by a lever into one of two positions to pick up a single gear on the leadscrew - and so select either a fast or a slow rate of feed the leadscrew on Bantams is used only for cutting threads and should normally be left disengaged.

The "Eagle" screwcutting gearbox gave 29 English pitches from 3. Sliding feed rates varied from 0. In every case the surfacing cross-feed rate was half that of the sliding. Both models were equipped as standard with a number of extra changewheels to extend the normal threading range beyond that commonly required; if these gears are missing from a used lathe, it's worthwhile asking if they have been stored separately and perhaps overlooked.

Power cross and longitudinal feeds were fitted to all models - with a push-pull knob to select sliding or surfacing and with the engagement and disengagement by a flick-in-and-out lever at the bottom of the apron.

To protect the power-feed mechanism against overload damage all models were fitted with a shear-pin incorporated in the topmost gear of the train to the screwcutting gearbox.. Stand Unfortunately the maker's stand, in basic form, lacked any form of storage, although some long-bed lathes have been found with a drawer across the central section between the plinths.

An interesting point concerns the four welded-on mounting points: the one at the back behind the headstock was set flush with the stand's lower edge and drilled and tapped 1-inch UNC to take a hollow, screwed stud through which passed a levelling bolt The other three points protruded below the base, with the threaded rear bolt assembly being used to set everything up level. For normal work the lathe stand could be left unsecured - or mounted on anti-vibration pads - it only being necessary to bolt it down if jobs were to involve high speeds with out-of-balance workpieces.

The base casting is easily broken when the slide is advanced from its central position.