Atlas lathe quick change gearbox rebuild
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"V" and combination beds are used for precision and light duty work, while flat beds are used for heavy duty work. Types of beds include inverted "V" beds, flat beds, and combination "V" and flat beds. The leadscrew of accurate pitch, drives the carriage holding the cutting tool via a gearbox driven from the headstock.
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The carriage travels by means of a rack and pinion system. This is facilitated by hardened and ground bedways which restrain the carriage and tailstock in a set track. The bed is a robust base that connects to the headstock and permits the carriage and tailstock to be moved parallel with the axis of the spindle. A fully 'geared head' allows the operator to select suitable speeds entirely through the gearbox. Later machines use a gear box driven by a dedicated electric motor. On older machines ('50s) the spindle was directly driven by a flat belt pulley with lower speeds available by manipulating the bull gear. This end of the spindle usually also has an included taper, frequently a Morse taper, to allow the insertion of hollow tubular (Morse standard) tapers to reduce the size of the tapered hole, and permit use of centers. The spindle runs in precision bearings and is fitted with some means of attaching workholding devices such as chucks or faceplates. This reduces preparation and waste of material. The main spindle is generally hollow to allow long bars to extend through to the work area. The headstock is required to be made as robust as possible due to the cutting forces involved, which can distort a lightly built housing, and induce harmonic vibrations that will transfer through to the workpiece, reducing the quality of the finished workpiece. The headstock (H1) houses the main spindle (H4), speed change mechanism (H2, H3), and change gears (H10). Headstock with legend, numbers and text within the description refer to those in the image This helps ensure the components manufactured on the machines can meet the required tolerances and repeatability. Better machines are solidly constructed with broad bearing surfaces ( slide-ways) for stability, and manufactured with great precision. These machines consist of (at the least) a headstock, bed, carriage, and tailstock. The design of lathes can vary greatly depending on the intended application however, basic features are common to most types. 2.7.1 Swiss-style Lathes and Live Tooling.2.7 Swiss-style lathe / Swiss turning center.2.1 Center lathe / engine lathe / bench lathe.But the person who can tell you whether or not they still have any should be able to tell you that.Īvailability on the used market is generally poor, probably because the complete gear boxes are in some demand.
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And fortunately almost all of the parts except for the main housing in the five different gearboxes are the same. The part number for the old and the new lever or arm is 10-1586. When the operator answers, ask for old Atlas Parts (Craftsman may confuse her). However, they are one of the few companies today who still try to support their older equipment, so it's at least worth a phone call. So be prepared for a little sticker shock if they still have them. So first thing to determine is the material.Ĭlausing (which was bought by Atlas but later shenanigans resulted in the name being changed) probably still has new replacements but I will warn you that the cost of machine tool repair parts is significantly higher than car parts, which are bad enough. If it is Zamak, the chances of a successful repair are smaller due to the lower melting point of the Zinc alloy. Depending upon where the break is, if yours is iron, it can probably be repaired by brazing and then machining so that the repair won't be too noticeable. These were later replaced by levers sand cast in cast iron and then machined at both ends but not over the middle portion. These can be easily identified as having an "I" cross section over part of the length.
#ATLAS LATHE QUICK CHANGE GEARBOX REBUILD MANUAL#
The only manual published on the 101.27430 and 101.27440 shows the Zamak selector handles. The selector levers on both of the 10" models and on the first 12" model of the Atlas QCGB's were originally die cast in Zamak.