1949-10-13 — Page 10

Why Production Goes Up

When VEELINK Goes On

THE ADJUSTABLE V-BELT

You Cao

couple any, de- sired length of belt from a real of VeeLink in less than sixty' seconds. There's no need to keep a large inventory of various belt lengths. With VeeLink in reels, any V-belt C be replaced in 2

few minutes.

It takes only a few minutes to install VeeLink cn the drive. That's why Vec- Link provides worthwhile say- ings of installa. tion time. Vee- Link belts be removed from old machines and easily installed on

others in opera- tion.

VeeLink V-belt stays on right VeeLink

link

construction pro- vides quick, easy tension

ment

to

adjust- and slippage... keeps achinery run- ning at full speed and productivity, Sude rail

pivcted

bases ***are

needed

Stocks Of All Sizes Available

or motor. Dot

Sole Agents-KIU FOONG TRADING CO.

26, Connaught Road, C.

ENGLISH

Tel. 28403.

ELECTRIC MOTORS

ALL SIZES UP TO 15 H.P.

IN STOCK

SOLE AGENTS:

THE JARDINE ENGINEERING

CORPORATION, LTD.

14-15, Pedder Street, Hongkong

Telephone: 30311

THE CHINA MAIL. THURSDAY, OCTOBER. 18, 1949.

ENGINEERING PAGE

p

This Radial drilling machine by Wm. Asquith Ltd. has a 3 hp motor on the drill bead which provides an Infinitely range of speeds to the drill, spindle between 70 and 3,500 r.p.m. Such a machine at this will drill holes in diameter up to 3 "in from the solid in cast iron.

GEC Contributions To The Brabazon

_Some_two-thirds of all the electrical wiring in the

Bristol Brabazon aircraft, which made its first flight on September 4 is carried out with Pirelli-General Civil Aircraft Cables.

A very large quantity of cabling is involved on oc- count of the many items of test and recording equipment installed in this 130-ten machine for amassing data during flight.

The cables are insulated with rubber or PVC, and have a glass- braide outer covering which effects a considerable saring in weight compared with the use of cotton. More than thousand

niles of these cables have been supplied to aircraft manufacturers in Great Britain and

Continuous Machine For Lead-Sheathing

Developments In Standard Types Of Machine Tools

By ROBERT HUTCHESON

Standard types of machine tools are the backbone

of any engineering establishment; even those- engaged on large scale repetition work, for.... which special-purpose machines have been installed, find uses for all manner of standard machines.

While machine tool builders in Britain ore makers of special-purpose machines, for which they have a high reputation, the United Kingdom today as in the past is looked "upon as the leading country for standard machine tools of extreme reliability.

In

The world has long appreciated),owards wide speed ranges. the high standard of Britain's! alder machines where only six machine tools, and India in par- eight changes of speed were provided, it was impossible in ticular has shown her confidence many instances to approximate: by her purchases of vast quanti closely to the correct cutting ties for railway workshops and speed. In the, ICECT weled to: shop a other engineering establishments grilling machine is

drill, take any reasonable size of throughout the country. Again, and also to be used for tapping.

for

many years young Indian This in itself calls for a Very engineers have received training wide range of speeds and feeds, in workshops in the British Isles but the need for a wide speed where they have had every op-range is intensified by alloy's to

manganese steels. portunity to work on and compare many makes ef machine tools and own opinions. thus form their Thus India has always been very closely associated with Britain's machine tool industry,

Considering the radial drilling machine specifically, the motor or the drill spindle is carried by the head that moves along the radial arm. In this way a com- pact, trouble-free and efficient drive is possible. As instanc of the versatility of standard machines we can include radial we may mention one make Inthes (centre and capstan and turret), drilling machines, horf nachine, capable of drilling zental boring machines and Ver the solid in mild steel, which is

bales

up to 2 ins. diameter from and turning boring

Tilsal!

In one of the main groups of

of the modern

are

cerned mainly with fitted with a 5 hp. motor and:

has spindle speeds which the machining of cylindrical su infinitely variable from 76 to faces, turing, boring and 3,560 rpm with feeds that are drilling. All British-buat machines variable from 0.004 to 0.4 in. per in this group have undergone revolution.

development along the same general.lines.

Design trendis In horizontal

The individual motor drive-borers and in vertical boring and frequently with the motor built turning mills are similar to those ot other machines in the into the machine-in place of the

spindle oid lineshaft and countershat Group. Setting of the

head and tall. Bearing of horizon-. drive, is practically universal and

facilitated by the it presents the only solution total borers 25

mide, *) use of build-in near scalds— the driving of many modern

frequently with verniers. machines requiring high horse, power. For example, lathes of 10 to 16 inches

in the case of vertical mills on are frequently which a considerable

OTIOUN D atted with 15 to 20 hp. motors, facing of large diameter work is and the transmission of such power to a large Somber, of machines becomes impractical for line shafting.

High Cutting Speeds

cemented

done there is a move towards

electronic control of table speed.

Stro!

I maintained neut

in order that a'constant cutting mored may be maintained, the table speed in revolutions per For overscas

many years the lead

minute being varied according sheaths of the underground ca- since their introduction in 1948.bles have been produced on in-

to the radial position of the tool. High horse powers for many | during cutting. A safeguard to the handling of termittently operating presses of these machine tools are duc

which have many drawbacks to the neeË for high roles of In this group of machine tools the Brabazon in the air is pro-Exact uniformity in the thick metal and they make possible the the trend is towards more power- vided by the use of GEC ofness of the sheaths is dificult

carbined uso of high cutting ful machines which will give al speeds and

carbide high rate of metal removal: England Heavy Alloy balance to obtain.

tools to give a high degree of wider cutting speed ranges with wrights in the aileron system, the When the press is stopped for!

productivity.

more speeds within the

and effect of their inertion being to refilling, a ridge is formed on the Thus we see, in lathes perti- ease of control and greater use of prevent inadvertent movements theath and the metal at such cularly, high spindle speeds with electrical control gear

ccupied places loses durability, owing to plenty of horse power, and this with individual motor drive. In controls that might en-its prolonged exposure to heat holds good for centre lathes used keeping with these advances and general British machine tools are also A new machine, manufactured in the tool room weighs 7 lb. but measures only by Pirelli-General Cable or machine shop and in capstan and well designed aesthetically. 6 in. x 2 in. x 1 in., and the six Ltd, Southampton, Hampshire,

turret lathes.

In the second group of machine together provide a total of 45 lb. England, overcomes the disadvant Preloaded, precision, taper rolls are planing, shaping, slotting in a remarkably small space, ages of intermittent pressez by aler bearings have become popular and milling machines, the main continuous production of lead for machine spindles, and in all function of which is the_produe= sheath by extrusion.

but the smallest machines there tion of flat surfaces. Here in- The machine consists of a cy-is a gear drive to the main creased speed ranges with more lindrical barrel provided with 4 spindle with the high speed speeds in the rage and a re mumber of channels and a steel shafts mounted in ball or roller duction of the time taken for screw in the middle of the barrel bearings. Speed changes are then return non-capting - movements into which moltes lead is intro- effected through gearing. : are general. duced and maintained at the

of the dange the aircraft. Each weight,

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Fire Places.

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Insulation: Heat, Cold & Sound. Ozone Generators...... Oil Cooking Ranges.

Oil Burners, Fully Automatic.

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DODWELL & CO., LTD.

MACHINERY & CONTRACTING

Shanghai Bank Building.

Hons Lear

DEPT.

Telephone 28021.

correct temperature by heaters. La screwcutting lathes the old Coolers are used to reader the loose change wheels are practi- molten lead plastic before it is cally obsolete and a gear box is compressed into a bontogenous pitches are given by the average used instead ¡Some 40 different mass in the die chamber where

the

Fear

the die used is selected to give a box when made of the

as use is

and as predictermined diameter and wall gear box for driving the feed

Screw, thickness to the sheathing.

shaft also, an equally large The machine is supplied with zumber of feeds for sliding and molten lead from a vertical mel-surfacing cuts is made available; ting pot maintained at a constant this is

particularly valuable temperature of between 350-375 feature on a general- purpose degrees · Centigrade. Temperature machine. The chasing or screw- recorders, thermostats and the on the lathe saddle

Cutting

dial has become standari varions electrical measuring ins truments are carried on a panel and greatly facilitates the cutting

The

of Food

pitch threads. The new

new machine is very easy High speeds, high horse powers to operate, since once the extru and heavy cutting have called for sion barrel has been filled, it need very strong and rigid machines.

near

machine.

not be emptied again unless Modern British machine tool

change to a different alloy to be made.

In fact, during a test more than

12 miles of cable have been sheath.

combine strength and

rigidity

with 2 smooth “streamlined” гро

ed in one operation. The procedure The electrical equipment fitted;

is to energise the heating coils so is particularly trouble-free. Safe-

that the

temperature of the

ty devices are provided to isolate barrel is raised to 360 degrees the

machine from the electricity Centigrade at the extrusion end supply when access is made to

The cable to be sheated is fed my of the electrical

gear: and manually into the machine through another of interlocks that pre- the dies.. After sheathing, the cable.

safety measure is the

is drawn one drum which as vent the Shamitaneous engage- rotated by a small eledete motor ment of f

two opposingmalions

The speed at watch the sheath is of the machine paris

formed can be controlled by changing the degree of cooling and puce this has been, setto ́n! suitable value the machine will continue to extrade the lead 'sheathing so long as it is supplied

with molten lead.”“”

Drilling Machines

In the case of drilling machines "especially in the case of hat apost useful type the radial there has been a trend

You can Speed up a job like this

BRIDGE"

SEJ

WITH

Lillington's

NO. 1 METALLIC LIQUID This Liquid is a rapid hardener and at the same time produces a waterproof, hardwearing and dustless concrete. These properties were utilised to the full in the construction of aerodromes and Government factories during the war. The use of Lillington's No. 1 Metallic Liquid enabled Service vehicles to carry supplies over the previous day's

concreting, thus speeding the job considerably.

No 2 METALLIC LIQUID-Waterproofs exterior brick- work and affords complete protection against heavy rains in exposed positions.

No. 5 METALLIC LIQUID—Makes concrete floors water

and dust proof.

roofs and

No. 6 METALLIC LIQUID-Repairs leaky

terraces.

PAINTCRETE-For exterior decoration. Outlasts distemper and lime wash. SOLD UNDER GUARANTEE Sole Agents:

MANNERS ENGINEERING LTD.

Mercantile Bank Bldg.

· Tel. 34174

SWITCH TO REDIFFUSION

FOR TROUBLE-FREE PERFECT LISTENING

TO INSTALL REDIFFUSION.

Call 26667-8

BRABAZON-

Predominantly Wired with

FIRELLI-UENERAL

CIVIL AIRCRAFT (P.G.C.A) CABLES

Supplied by.

G.E.C

ALSO—G.E.C. HEAVY ALLOY supplied for balance weights in the elevator control circuit THE BRITISH GENERAL ELECTRIC CO., LTD.

QUEEN'S BUILDING, HONG KONG

A Subsidiary of

THE BRITISH GENERAL ELECTRIC CO., LTD. OF ENGLAND.