Brigeport TEXTRON milling, drilling en boring machines

Bridgeport textron míllíng, drilling and boring machínes

INTRODUCTION DEMONSTRATIONS
The Bridgeport was first designed ín 1938 by Magnus A showroom at Leicester ís avaílable for demonstra-
Wahlstrom and Rudolph Bannow, two Swedish tions on the range of Bridgeport machínes. Most of
Engineers living ín America. This provided a new our Overseas Distributors have símílar facílítíes.
concept in milling machines, the intention of which
was to utilize the full capabilities of the mílling,
drílling and boring head whích they had been buíldíng AFTER SALES SERVICE
Wíth every Brídgeport purchase comes the assurance
This head had proved so versatile that it was found of an After Sa1es Servíce second to none and a team
that conventíonal machines did not a11ow íts full of fully qualífied Sa1es and Servíce Engíneers arepotential to be used. They therefore decided to based strategícally throughout the design and buíld a completely new machíne.
Factory trained Engineers are also based ín manyother countríes around the world to ensure that
THE SECRET
overseas customers receive the best possible attention.
The versatility of thís new machine allowed themilling head to be moved into practically any posítion relatíve to the table and workpiece. Not only could ít machíne an area larger than the table, but by rotating the turret through 1800, a second head mounted on the opposite end of the ram could be
used. Thís allowed the milling and boring operations to be followed by shaping, slotting etc., without disturbíng the orígínal set-up.
The Bridgeport helps you to
VALUE FOR MONEY stay ahead of your competition.
Brillíantly conceived, soundly built and, due tomodern large scale productíon methods, ít continuesto provide real value for money. These features,
together with the tremendous versatility, are responsible for making the Brídgeport one of the world s most popular míllíng machines wíth a total productíon now exceeding a míllíon machínes.
A purpose buílt factory in Brídlington, West Humberside, was designed to ensure that the fuller benefits of modern flow-líne productíon techniques were fu11y For certaín photographs ín this leaflet the cutter guard has
utilized. This enables the Brídgeport to be built in been removed to present the applicatíon wíth a greater degree line wíth our policy of províding good qualíty ma- of clarity. Guards must be fítted at all times when the machíne
chine tools at 1ow cost. is in operation.
BridgeØrt Machínes Divísíon of Textron Ltd.

Design Features
The Brídgeport ís a milling, drílling and boríng machíne that, 1 T S TOUGHER THAN YOU THINK
wíth the combínation of head, ram, turret and table movements, can machine a job longer and wíder than its own table The standard demonstration cut of the Bridgeport Model
and from any angle. in fact the Brídgeport with its extensive BR2J2 ís:
range of attachments is not on1y a míllíng machíne, but can be Meta1 Removal Volume 28 1 /в
Material 30 ton/tensile mild steel almost a complete workshop in ítself.
Cutter 4 tooth end mill
Spindle Speed 1200 г 1200 г This versatilíty and the range of attachments means that
Feed Rate 75 mm/mіп. 3 ins./min.
should the user s type of work change, the Bridgeport canDepth of Cut 25 mm 1 in.
invariably be changed to suit the new requirements. Width of Cút 15 mm /8 in.
Maximum and rígidity under cut, is ensured The following pages illustrate some of the by the robust construction of the major castings and many features providing the tremendous
the extra wide slídeways, whích also provide year 5 versatility that makes the Bridgeport the of accurate and economical production. world s most popular míllíng machíne withover /4 millíon.
Shaping and slottíng
lnfinitely variable attachment--page 5.
speed type 2J2 mіlling, drilling and boring head. For choice
Unique ram clamp-
of heads

R8 taper spindle for range of toolíng-
2 axis digital read out system- 
Slideway design 
Range of work holdíng devices-
Centralised cross screw- 
lnfinitely variable power feed and rapid traverse- page 10.
Choice f Heads
Both , the Bridgeport type J and 2J2 millíng heads take clutch mechanísm protects the quí11 from overload thus extraordinarily heavy cuts for thě power supplied, due to the elíminating possíble damage to the machine, component and very hígh qualíty of component parts and assembly proced- operator.
the type J head has a 3/4 11/2 kw 1 - 2 motor
SPINDLE providíng 15 spindle speeds from 67 - 4600 , whilst the
type 2J2 has ínfínítely varíable spíndle speeds from 50 - 3750 The R8 spindle taper of both the type J and 2J2 heáds
and is powered by a 11/2 kw 2 motor. faciIitates the interchangeability of the wide range of spindle toolíng avaіlable.
Whílst primarily intended for use on the Brídgeport machíne,
The R8 taper holds the collet dírectly in the spindle nose,the independent motor dríve enables eíther head to be fítted so reducing the dístance from spíndle nose to cutter end to a to other conventíonal milling machínes and specíal purpose minimum. This ensures maximum rigídíty, accuracy of cut and machíne tools.
a good surface finísh.
The ímportant features of these heads are:
Greater safety and increased productivíty are aided by the
QU1LL quíck acting spindle brake which may be locked on to facilí-
tate tool changing. The qui11 ís hard chrome plated and accurately ground and
lapped to fít the honed bore in the main castíng. 1t ís carefully BELT HOUSING AND MOTOR SUPPORT
counterbalanced and a sensítíve hand feed 1ever and a slow
hand feed through a worm and worm wheel are provided. Both The belt housíng and motor support may be swívelled through
lever and handwheel are readíly detachable for operator 3600 enabling the head to be used in positions where the
conveníence. Three rates of power feed in both dírectíons are housing or support míght otherwíse fou1.
also províded. An adjustable mícrometer depth stop provides
automatíc disengagement at the required depth for accurate
boring and dríllíng operations.
The design of the positíve quíll clamp prevents over-tíghteníng,
and the subsequent risk of quill dístortíon whílst a slíppíng
Air Cooling
AIR EXHAUST

BELT HOUSING MOTOR

REVERSE FLOW AIR COOLING

The unique and patented air cooling system of the type 2J2 head ensures that the heat build-up ín the spindle bearings, belt
and quill area is kept to an absolute minimum. This is achieved by the air being drawn ínto the housing and past the spindle bearíngs by the rotation of the drive belt, fínally being emitted out of the exhaust at the top. Dístortion ís therefore avoided
By maintainíng the operatíng temperature to withín 20 F of ambíent, resulting ín íncreased belt and bearing life and maintained accuracy.

R8 TAPER
The R8 spindle taper was specíally desígned for the Bridgeport and ís now accepted as a standard by leading spíndle tool andchuck manufacturers all over the world.
A majoríty of the work carried out on Brídgeports ís end millíng usíng collets which, wíth the R8 taper, can be located directly ínto the spindle nose. Thís reduces the dístance between the spindle bearing and the end of the cutter to a minimum.
The drawings opposíte show the advantage of using an R8 taper. With other tapers the end mi11 ìs approximately twíce as far away from the spindle bearing and therefore the deflection is eight times greater.
Type E Shaping and Slotting Head
The type E slottíng and shaping head mounted on the rear of the ram ís aп extremely useful addítion to the Brídgeport machine. The swívellíng turret enables the E head to be quickly and easìly swung into posítion to slot or shape a prevíously machíned component - and wíthout dísturbing the origínal set-up. Mouııted on a swível adaptor the head can also be posítioned to work vertícally or at any angle. 
Dríven by íts own 1/4 kw 1/3 motor, it has síx rates of oscíllation from 60 - 350 strokes per minute. The stroke is adjustable from 3- 100 mm in 3 mm steps 1/8 to 4 x 1/8 , adjustment beíng made símply by slackeníng a nut
and turning the índícator dial.
Cuttíng tools can be located vertically or horizontally in the tool holder, which íncorporates a clapper box for tool relief on the return stroke. The clapper box can be locked when not requíred. Capacíty for horizontally mounted tools ís 9 mm 3/8 and for vertically mounted tools is 15 mm 5/8 . The
type E head can also be fitted to other conventional mílling machines and to special purpose machíne tools.
Detaíls of the Shapíng Too1s avaílable are gíven on page 19.
Capacity
The normal vertical milling machíne ís oп1y capable of machíning an area consíderably smaller than íts table.
The highly successful Brídgeport concept of utílizíng the combined movements of table, cross-slide, ram and turret, allows a component consíderably larger than its own table to be machined without the necessíty of costly re-setting procedures. The Brídgeport table síze of 1065 x 230 mm 42 x 9 has proved to be more than adequate for a vast number of jobs
that may otherwise have required a considerably larger and more expensive machine.
Versatility
The Brídgeport Milling, Drílling and Boring Machíne provides craftmanshíp, versatilíty and va1ue for money with a fírst class after-sales service. Over 250,000 machínes to date have taken the name Brídgeport ínto toolrooms, production and maíntenance workshops and educatíonal estab íshments
throughout the world.
Extra 1on9 work can be accommodated by moving the ram, turret, table and cross-slíde.

The milling head can be swiveled in two planes to permit spot facing, drilling, or boring at compound angles. Extra wide jobs can be machined by utilizing the combined movements of both ram and table. Vertical faces can be machined by tilting the milling head through 90°. A special lubrication arrangement is available for heads intended for continual use in the horizontal position.

The tee ram option increases production by accommodating up to three milling heads, permitting the simultaneous machining of small components. To provide increased vertical capacity, the Bridgeport can be fitted with a 100 mm or 175 mm 4 or 7 riser block.

Accuracy

The Brídgeport s design of vee slídeways bedding on the outer faces fig. 1 provídes a wíde bearíng area and, for more than 30 years, has proved to be the most effícíent for thís type and síze of machíne. The síngle adjustment of the gíb strip fig. 2 takes up wear ín both planes no keep plates to be removed for machining and maíntains a precíse fít to ensure maximum
sensítívity, accuracy and rígídíty wíth mínimum vibration and wear. The ease of adjustment creates a natural tendency for the slídeways to be correctly maíntaíned resultíng ín extra years of accurate life.

CENTRALISED CROSS SCREW
The cross screw, positíoned centrally between symmetrícal slideways, provides a balanced thrust at equal dístances from the frictíon forces of the two slídeways fíg. 3 . This avoids out of balance forces whích can cause crabbíng of the cross slide fig. 4 .
The cross screw ís completely covered by way guards to pre vent damage from the íngress of swarf and dirt.
RAM CLAMP
The ram runs in vee slídeways and ís moved backwards and forwards through a rack and píníon mechanísm to enable accurate posítioníng.
The Brídgeport patented method of clamping the ram is to
expand the ram into the slideways on top of the turret. Thís
method gíves a wíder area of contact for a very rígíd joínt so
increasing stíffness and reducíng víbration.

Ease of Operation
CENTRALISED LUBRICATION
Correct lubrícation gíves a longer accurate lífe to the machíne  
therefore reducíng maíntenance and makíng the machine more sensítíve and easier for the operator to work. A centralísed system, fítted as standard to al Brídgeport machínes, lubrícates slídeways, leadscrews and the bevel gears of the knee elevating mechanísm. Operatíon of the system by a síngle lever saves the operator tíme and makes it easy for him to gíve each
moving part the correct amount of oil, pre-determíned by a seríes of inetering valves built ínto the system.

HARD CHROME SLIDEWAYS
The manufacturing specifícatíon of the Brídgeport machine includes the optíon of hard chrome plated slídeways to dive extra years of accurate lífe. The specíal Poeton-Tíbon precision process enables the hand scraped slídeways to be hard chrome plated to a uniform thíckness of approximately mm 
The surfaces plated are:
Top of cross slíde - longítudinel movement.
Top of knee - cross movement.
Cross slide to table gíb.
Poeton chrome platíng becomes ari íntegral part of the base castíng and sínce heat is not invo1ved in the process ít cannot set up any stresses or straíns. The slíghtly porous deposit provídes an ideal lubrícant absorbíng surface with an extremely low co-effícíent of fríctíon and also gives corrosíon resistance to the slideways. Hardness exceeds Rockwell which gíves outstanding wear qualíties.
Higher Production Capability
DIGITAL READ-OUT
The 2 axis dígital read-out system avaílable with the Brídgeport can provide a better and more uniform machíníng qualíty and hígher production effícíency whích - with less straín on the operator - constitutes a reductíon of rejects and of quality control costs. Features include the facilíty to set to zero or a pre-determíned reference datum at any desíred location wíth-in the measuring length, inch/metríc swítchíng and an absolute reference mark Memofix . The latter feature provides a fíxed reference poínt on the scales to enable easy and relíable reestablishíng of the pre-determined  work píece reference datum.
Thís feature ís invaivable in the event of operation interruptions, power supply faílure or repeated zeroíng for chaín dímensional operatíons.
System resolution is mm oг and the standard
traversíng lengths are X axis 660 mm 26 and Y axís 305
DISTORTION FREE CLAMPS
A complete DRO system comprísíng dísplay unít, scales,
transducers, brackets and full fíttíng ínstructíons ís available The dígital read-out system is provided wíth special reed type
for retro-fít to existíng Brídgeports. distortion free clamps fítted to the machine table and cross
slide. These elíminate the dísplacement which often occur
with norma1 míllíng machine clamping systems.
INFINITELY VARIABLE LONGITUDINAL POWER FEED UNIT 1NF1N1TELY VARIABLE CROSS FEED POWER UN1T
W1TH RAP1D TRAVERSE W1TH RAP1D TRAVERSE
1NF1N1TELY VARIABLE POWER FEED
lnfinitely varíable power feed units specífícally desígned for Feed rates of both uníts are variable from 20 mm to 875
the Bridgeport are available for both the longítudínal and cross mm 3/4 to 35 per mínute and the rapíd traverse feed rate
axes and can be fítted tò machínes having table lengths up to is 1143 mm 45 per mínute.
1220 mm 48 . Both units incorporate rapid traverse con-
trolled by means of a pushbutton whilst the feed is selected
by turning the graduated dia1 mounted on front of the unit.
All Round Safety Operator Convenience

All Bridgeport machines are desígned to provide maximum operator safety and conveníence thus helping to ensure that the investment in people, machine, tooling and components ís protected.
Spíndle Brake - rapidly stops the spindle and can be locked on to facílitate tool changìng.
Slíppíng Clutch - protects the quíll from possíble damage due to overload.
Cutter Guard - supplíed as standard with all machínes.
Electrícal lnterlocks - the feed cannot be started if the spindle is stationary.

Traverse Handles automatícally dísengage when
Traverse Handles traversíng. - automatically dísengage when traversing.


Stop Button a red mushroom headed Emergency Stop Button is íncorporated on the control panel.
Knee Elevation Handle position may be reversed when not in use.

OPERATOR CONVENIENCE
Grouping of Controls - all the main controls are easily Single Spanner Operation - the standard Bridgeport spanner
operated from the front of the machíne, íncluding the fits  the movement controls and lockíng bolts on the slide clamps for all three axes. milling head, ram, turret and ram adaptor.
Feed Selection - quick and simple selectíon of cross and Centralised Lubrication System - sìngle lever movement
longitudínal traverse is controlled by graduated dial. Rapid lubricates all slides, leadscrews and elevatíng bevel gears.
traverse ís obtaíned by pushbutton.

OVERALL SPACE REQUIRED
Accessories

The comprehensive range of accessories considerably extends the Bridgeport's versatile capabilities. Most accessories may be retrofitted, allowing the machine to accommodate changing production requirements. Precision-built to rigid standards, the Quillmaster is fitted with permanently lubricated precision bearings and a hardened ground spindle.

The Quillmaster gearing provides a 50% increase over the machine spindle speed to permit efficient use of small end mills. Collet capacities are 2 mm, 3 mm, 4 mm, and 5 mm (1/8", 5/32", and 3/16") in diameter.

The advantages of the Quillmaster are quickly recognized by tool and diemakers, as it allows any corner with a small radius to be finished milled to a degree of sharpness not previously possible. The spindle housing of the attachment may be adjusted to any position between vertical and horizontal and through 360 degrees on the quill. By tilting the spindle housing, the inside walls of an impression may be milled.

The Quillmaster right-angle attachment (QRA) further increases the usefulness of the attachment. The QRA unit has permanently sealed bearings and a 5 mm (3/16") diameter capacity.

HOW ELSE WOULD YOU DO THESE JOBS
Accessories
RIGHT ANGLE ATTACHMENTS FOR MILLING HEADS
Ideal for machíning pockets and cavíties, these attachments facílítate míllíng, drílling, boring and reamíng at right angles to the spíndle of the mílling head.
Two sizes are available, the No. 3 attachment 4:3 speed reductíon for relatívely heavy duty work and the No. 4 attachment 2:1 speed reductíon for use in posítíons that would be inaccessible to the larger No. 3 unít.
The cutter and drive spíndles of both attachments are mounted in theír own anti-fríctíon bearíngs and are dríven direct from the R8 taper of the millíng head by a dríve shaft. Mounting consísts of placíng the attachment on the quí11, securíng the drìve shaft by means of the spíndle draw bar a 3/8 R8
collet is requíred for the No. 4 unít and then tíghteníng the clamping screw to hold the attachment fírmly to the quill.
Co11et sizes available:
RIGHT ANGLE ARBOR SUPPORT BRACKET
Thís unít ís used in conjunction wíth the No. 3 ríght angle attachment to convert the Brídgeport machine to horízontal
milling ín a matter of minutes. Ideal for líght horizontal milling, gear cuttíng usíng a dívídíng head and many other jobs where an arbor support at both ends ís helpful.
Arbors, complete with spacers and nuts, are available in dífferent lengths and díameters as detaíled on the price líst.

EQUIPMENT CABINET
Specífícally desígned to accommodate the small accessoríes and spindle toolíng of the Brídgeport machíne, the cabinet has two large smooth actíon drawers, three shelves whích are pívoted for easy access and lockable doors. Provísíon ís made for mountíng the clamp set on an exteríor síde panel.
SPLASH TRAY
The capacious, tough glass fíbre splash tray ís partíćularly useful when coolant ís used líberally and also aíds good house keepíng by keeping swarf from the shop floor. Two poínt fíxíng makes the líghtweíght tray easily removable for cleaníng purposes. The splash tray ís illustrated on page 1.

CROSS TRAVEL STOP
The cross travel stop attachment is invaluable for repetítíon work wíth Y axis movement. The tee slot bar carries two adjustable stops and the unit may be fítted on eíther síde of the knee. A second bar fíxed to the cross slide contacts the stops which may be set to knock-off the cross traverse movement at any pre-determíned posítíon.
ALSO AVAILABLE
lnch/metríc dual readíng dials.
Flood coolant system.
Low voltage machíne lightíng.

Work Holding
ROTARY TABLES
The Model RH 20 rotary table has a 200 mm 8 díameter table and ís fítted wíth a hardened and ground worm whích can be swívelled to dísengage from the worm wheel and for adjustíng backlash. The hand wheel is provided with a dial readíng to 2 minutes and a vernier to 12 seconds. A símílar
table, Mode1 RH1 20, is available wíth dividing mechanísm and dívídíng plate havíng hole círcles from 14 to 49 giving all dívísíons up to 50 and many more. An addítíonal plate is available givíng all divísíons up to 100.
A complete range of rotary tables is available for all sízes of millíng machínes. Table can be supplíed with dírect or índírect índexíng, vertícal and/or horízontal mounting, mechanical or electrícal operatíon and in díameters up to 1000 mm 40 .
Full details arP gíven in a separate brochure.

DIVIDING HEADS
The 100 mm 4 centre heíght dívídíng head ís recommended for use on the Brídgeport and ís available as semí or fully universal and is suitable for direct, índirect díviding, plus dífferential dívíding on the fully uníversal model. A complete range of divídíng heads is also available, with centre heights
ranging from 80 mm 31/8 to 350 mm 14 and the option of fully universal, semi universal, plain índexing and rapid índexíng for eíther mechanícal or electrical operatíon. Both single and multi-spíndle models are available. Full details are gíven in a separate brochure. 

VERTICAL COLLET CHUCK ATTACHMENT
The síze range provídes collet capacíty from 3 mm 1/8 to 75 mm 3 . A quick single lever movement índexes the collet by a pre-determined amount.
MACHINE VI0ES
Bridgeport plain and swível vices are of robust constructíon and toolroom users wíll appreciate the advantageous features. 
The 25 mm 1 , 6 í., leadscrew ensures smooth and effícíent operatíon of the precisíon ground hardened steel vice jaws to provide a maximum openíng of 125 mm 5 . The phosphor bronze leadscrew nut is self-lubricatíng and the
deep coolant trough in the base directs the coolant back onto the table. The base of the plaín vice has opposed tennon slots to a11ow the vice to be mounted parallel or at right angles to the machíne table. The swível vice ís graduated through 3600 to facílitate fast and accurate angular settings.
Work Holding
COMBINATION ANGLE PLATE AND SINE TABLE
The rigídly constructed unit is very useful for easy and accurate plain or compound angle set-ups. The table has adjustable side supports and hinge bolts that can be tílted to ensure maximum rigidity. By tíghtening two screws through the plate into the base, the unít becomes a solid angle plate wíth a
255 mm 10 sine bar which may be detached or moved to the horizontal surface for plain or compound angle set-ups.
The table working surfaces are:
Horízontal 255 x 305 mm 10 x 12 .
Vertical 150 x 305 mm 6 x 12 .
The síne table tee slot wídths are 13 mm 1/2 .
CLAMP SET
The clamp set comprises, clamping bars, bolts, connectors, tee slot nuts etc., and are arranged in a robust container to enable quíck and easy selectíon. The container may be used freestanding or mounted on a vertical surface usíng the two key hole slots provided.
Spindle Tooling
SPINDLE COLLETS AND ADAPTORS
R8 Taper - available from 2 to 20 mm diameter ín 1 mm steps1/8 to 3/4 x 1/16 .
No. 2 Morse Taper available from 3 to 13 mm díameter in 1 mm steps 1/16 to 1/2 x 1/16 .
Adaptors can be supplied to convert the R8 taper to No. 1 orNo. 2 Morse Taper.
STUB ARBORS 
R8 Taper - left and right hand thread, supplied complete wíth
spacers and nuts in the following diameters:
SHELL END MILL ARBORS
R8 Taper 13, 16, 27, 32 mm 1/2 , 3/4, 1 diameter.
COLLET CHUCKS
Titanic - R8 Taper - complete wíth set  
1/4 , 3/8 , 1/2 , 5/8 collets, or wíth 
Clarkson Autolock Chucks - R8 Taper - complete with set of
6, 10, 12, 16 mm 1/4 , 3/8 , 1/2 , 5/8 collets or with
25 mm 1 collet.
DR1LL CHUCKS
Jacobs - R8 Taper - 13 mm 1/2 or 20 mm 3/4 capacity.
Albrecht Keyless - R8 Taper - 10, 13 or 16 mm 3/8 , 1/2 or
5 capacity.
Spindle Tooling

END MILL HOLDERS
End mílls can be rígídly locked in these holders and the leading edge ís chamferred to allow maximum visíon when machining pockets. The short overall length ensures that the tool is held as close as possíble to the spíndle bearing thus ensuríng maximum rígidíty under cut. Sizes are 6, 10, 1 dìameters.
HIGH SPEED FLYCUTTER
The High Speed Flycutter is counterbalanced to provide faster machiníng with improved surface fínísh. Supplied complete wíth one unground solid carbíde cuttíng tool of general grade м1o .

Addítíonal tools in packs of 5 caп be supplíed.

BORING HEADS
88 Taper No. 1 Boring Head compríses 4 boring tools, 1
boríng bar, 2 A11en keys.
88 Taper - No. 2 Boríng Head compríses 4 boring tools, 4
boríng bars, 3 A11eп keys.
1 SHAPING TOOLS ιo
For use with the type E shaping and slottíng attachment. The set compríses 5 hígh speed steel tools of varying shapes and sízes as índícated plus 2 bars and a specíal holder for síde 2 3 4 mounting ín the clapper box. The extension bars and síde -mountíng holder are designed to take 5 mm 3/16 tool bíts. 

Seríes II Specíal
4 6etter fnaгhine. f1 Ьetter buy.
Whir/iecer Øay yoii look at it.
Seríes CNC
Caralogue No. 105
Series I Synchro-Trac
Catalogue No. 103
Seríes II Synchro-Trace
Catalogue No. 103