In The Home Workshop

Argus Books Argus House Boundary Way Hemel Hempstead Hertfordshire HP2 7ST England First published 1977 Second impression 1979 Second edition 1984 Reprinted 1986, 1988, 1989, 1990, 1991, 1993 All rights reserved. No part of this publication may be reproduced in any form by print, photography, microfilm or any other means without written permission from the publisher. Phototypesetting by Performance Typesetting, Milton Keynes Printed and bound in Great Britain by Biddies Ltd, Guildford and...

Workholding with Difficult Shapes

Problems do arise from time to time regarding the methods of holding work in the milling machine. In full scale engineering these problems are not nearly so acute as components are more solid and clamps can be applied without crushing the pieces. Often with model parts it is difficult to get a hold sufficiently firmly without more or less mutilating the piece. One method I often use both for castings and bar material is to arrange for an accurate chucking piece to be left on the component until...

Index

Abwood milling attachment 12 Amolco milling attachment and Angleplates 80 Angleplate used as backstop 27,29 Arbors for slitting saws and disc cutters 35 Chucks, Clare, Clarkson, Osborn 82 Crosshead slides, engine bedplate 30 principle 54 Plain type, change wheel Packing block for centre height 57 Steady stand for extra rigidity 56 Dividing heads and gear-cutting 62 Cutting engraving flat arcuate scale D-bit for hole centring to start drills Direction of table rotation 52 Locking precautions for...

Slitting and Cutting

It is common practice to design machinery components with split bosses which can be contracted with a screw for tightening purposes. The slitting can be done with a hacksaw, but if done in unskilful fashion will not look good when completed. Slitting saws and many other disc type cutters can be readily used on the vertical miller by mounting them on a Morse taper arbor having a parallel portion for the cutter, and a nut to secure it. Its a good thing to put a pair of flats on the arbor to hold...

Milling Flat Surfaces

Of all metal-working operations the production of true flat surfaces is perhaps one of the most difficult if reliance has to be placed on hand tools and hand methods, for it depends just about completely on the personal skill of the workman. But a point offset from the spindle centre of a vertical milling machine must when rotated describe a flat plane in space if there is no axial movement. Therefore, provided the spindle is truly square to the table, an offset cutting tool must generate a...

Evolution of the Vertical Miller

Drummond Lathe Mods

The horizontal milling machine evolved naturally from the lathe in the first or second decade of the nineteenth century. Eli Whitney (U.S.A.) is said to have had one in use about 1818, and in Tools for the Job the late L.T.C. Rolt recounted how the young engineer James Nasmyth (later to become famous as the inventor of the steam hammer and other appliances) fixed one up and milled the flats on hundreds of tiny hexagon nuts for a model of a Maudslay marine engine, while working for Henry...

End Rounding

In model work, as in full sized machinery, many components such as crank webs, connecting and coupling rods, machine links, etc. have to have rounded ends. These can be produced by filing, and the use of hardenerd steel collars and rollers for guides has often been recommended in Model Engineer to help the not-so- good filer to achieve a good appearance. Even with these, this kind of filing demands a skill which many modellers just do not have (and will never acquire, for want of practice, if...

Keyway Cutting

Feather Key Operation

Keys and keyways are a very common feature of machinery and naturally of models too. The common round-ended keyway, for a feather' key, is easily produced on a parallel shaft by holding the shaft in the vice and using a small endmill, or two-flute 'slot-drill'. Fig. 24 shows the setup for this operation. Various parts of car and motor cycle engines, gearboxes, and other machinery components in the past have had wheels mounted on tapered shafts with the keyways following the slope of the taper....

Milling Chucks for Safe Cutter Holding

The newcomer to vertical milling may wonder why there should be any need for special chucks for milling cutters, and especially when he sees that these are fairly expensive accessories, may be tempted to make do without one. But first of all it is necessary to realise that the forces acting upon milling cutters in use are generally quite different from those acting on drills in a drilling machine or lathe. The drill is usually subjected, except at the moment of complete penetration, to axial...

List of Illustrations

1 Abwood milling attachment of the 1920s 13 2 E. T. Westbury's milling machine 14 3 Dore-Westbury machine 15 4 Dore-Westbury Mk II machine 16 14 Set of three flycutters 28 15 Flycutting a bracket 28 1 6 Flycutting connecting rod ends 29 17 Flycutting tapered bar material 29 18 Flycutting cylinder soleplate 30 20 Milling flywheel joint face 31 21 Milling crosshead slide 32 22 Milling bearing jaws in bedplate 33 23 Slitting boss of casting 35 24 Milling feather keyway 37 25 Milling feather keyway...