Brcal milling, drilling and boring machinesigeport BRJ Vertl

Bridgeport  Vertlcal milling,drilling and boring machines

LEAD THE WORLD
In the current trend to automated machiníng the Series remaíns supreme in
maпy situations and for those díffícult and awkward jobs. Amazin9 versatilíty and capabilíty for horízontal, vertícal or angular míllíng, drillíng and boring plus the abílíty to cope with work outsíde the capacíty of much larger machines. Brídgeport precfsíon machíne tools are MADE IN BRITAIN to
stríct qualíty control standards and backed by 70 years design and manufacturing experíence.
Uertical milling, drillíng and boring machines

INTRODUCTION

The Bridgeport milling machine, first designed in 1938 by Magnus Wahlstrom and Rudolph Bannow, introduced a revolutionary concept in milling machines. Originally, they had been building a versatile milling, drilling, and boring head since 1928, which proved to be so adaptable that conventional machines of the time couldn't fully utilize its potential. This led them to design and build a completely new machine.

The Secret

The key innovation of the Bridgeport was its versatility. Unlike traditional machines, the milling head of the Bridgeport could be moved into practically any position relative to the table and workpiece. This capability allowed it to machine areas larger than its own table. Moreover, by rotating the turret through 180 degrees, a second head mounted on the opposite end of the ram could be used. This setup enabled seamless transitions between milling, boring, shaping, slotting, and other operations without disturbing the original setup.

Value for Money

Bridgeport machines were brilliantly conceived and solidly built. Modern large-scale production methods further enhanced their cost-effectiveness. These factors, combined with their tremendous versatility, contributed to making Bridgeport one of the world's most popular milling machines, with production exceeding millions of units. A purpose-built factory in Bridlington, West Humberside, was designed to maximize the benefits of modern flow-line production techniques, ensuring high-quality machine tools at low costs.

### Design Features

The Bridgeport is more than just a milling machine; it's also capable of drilling and boring. Its combination of head, ram, turret, and table movements allows it to handle jobs longer and wider than its own table, and from virtually any angle. With its extensive range of attachments, the Bridgeport can function almost like a complete workshop in itself. This versatility makes it adaptable to changing work requirements, as it can be reconfigured with different attachments as needed.

To ensure maximum strength and rigidity during cutting operations, the Bridgeport features robust construction with major castings and extra-wide slideways. These design elements not only provide years of accurate and economical production but also ensure stability under load.

Overall, the Bridgeport milling machine remains a hallmark of versatility, durability, and cost-effectiveness in the machining industry, continuing to serve various manufacturing needs with its adaptable design and robust performance.

1. Choice of millíng heads - pa9e З.
2. R8 taper tooling - pages 18 19.
З. Slídeway desígn - page 8.
4. Centralísed cross screw - pa9e 8.
5. Shapíng slotting head - page 5.
6. Uníque ram clamp - page 8.
7. 2 axís dígítal readout - page 10.
8. Work holding devices - pages 16 17.
9. Power feed/rapid traverse - page 10.
1T S TOUGHER THAN YOU TH1NK
The standard demonstration cut of the
Bridgeport Mode1 BR2J2 is:
Meta1 removal volume 28
Materíal 30 ton/tensile mild steel
Cutter 4 tooth end mi11
Spindle speed 1200 г
Feed rate 75 mm/mіп. 3 /mіn.
Depth of cut 25 mm 1
4 Width of cut 15 mm 5/8
Type J Head

The Bridgeport milling machine, initially designed in 1938 by Magnus Wahlstrom and Rudolph Bannow, has become renowned for its robust design, versatility, and wide-ranging capabilities in machining, drilling, and boring. Here’s a breakdown of its key features and options:

 Choice of Milling Heads

Both the Bridgeport Type J and 2J2 milling heads are capable of handling heavy cuts efficiently due to their high-quality components and precise assembly:

Type J Head: Equipped with a 1.5-2 kW motor, providing 15 spindle speeds ranging from 67 to 4600 RPM.
  
Type 2J2 Head Features infinitely variable spindle speeds from 50 to 3750 RPM, powered by a 1 kW motor.

Quill

- The quill is hard chrome plated, accurately ground, and lapped to fit the honed bore in the main casting.
- It features sensitive hand feed lever and slow feed handwheel, detachable for operator convenience.
- Offers three rates of power feed in both directions with an adjustable micrometer stop for precise depth control.
- A positive quill clamp design prevents over-tightening and distortion, with a slipping clutch mechanism to protect against overload.

Spindle

- Uses the R8 spindle taper, allowing for interchangeability with a wide range of spindle tooling.
- The R8 taper minimizes the distance between the spindle bearings and the cutter, enhancing precision.
- Includes a quick-acting spindle brake for easy tool changes, which can be locked for safety during operation.

Belt Housing and Motor Support

- The belt housing and motor support can swivel through 360 degrees, enabling flexible positioning of the milling head.
- This feature allows the head to be used in positions where the housing or support might otherwise obstruct.

Reverse Flow Air Cooling

- The Type 2J2 head incorporates a unique air cooling system that keeps heat buildup in the spindle bearings, belt, and quill area to a minimum.
- Air is drawn into the housing and past the spindle bearings by the drive belt, then exhausted at the top, maintaining operating temperatures close to ambient.
- This system enhances belt and bearing life while preserving machining accuracy.

Type E Slotting and Shaping Head Option

- Mounted on the rear of the ram, the Type E head is designed for slotting and shaping operations.
- It features a swiveling turret for quick positioning and can operate vertically or at any angle.
- Driven by its own 1/4 kW motor, it offers six rates of oscillation and adjustable stroke from 3 to 100 mm.
- Capabilities include vertical or horizontal tool mounting with a clapper box for tool relief.

bridgeport Unit Heads

- The Type J, 2J2, and E heads, due to their independent motor drive, can be used not only on Bridgeport machines but also on other conventional milling machines and special-purpose tools.

Versatility and Applications

- The Bridgeport milling machine excels in craftsmanship, versatility, and value for money, supported by comprehensive after-sales service.
- Its ability to handle large jobs exceeding the table size and perform operations from various angles makes it suitable for diverse applications in toolrooms, production, maintenance workshops, and educational institutions worldwide.

The Bridgeport remains a benchmark in milling machine technology, combining innovation, durability, and adaptability to meet evolving manufacturing needs across industries.

Accuracy and Design Features of the Bridgeport Milling Machine

The Bridgeport milling machine is celebrated for its precision engineering and robust design, incorporating several key features that enhance accuracy, ease of operation, and longevity.

 Vee Slides

Design: Vee slideways on the outer faces provide a broad bearing area, proven effective over more than 30 years for this type and size of machine.
Gib Strip Adjustment: A single adjustment of the gib strip accommodates wear in both planes, ensuring a precise fit without needing to remove plates for machining. This design minimizes vibration and wear, maximizing sensitivity and rigidity.
Centralized Cross Screw: Positioned centrally between symmetric slideways, it balances thrust evenly, preventing imbalances that could cause cross slide crabbing.

Ram Clamp

- The ram operates on vee slideways and moves via a rack and pinion mechanism for accurate positioning.
- Patented method of ram clamping expands the ram into the slideways on top of the turret, enhancing rigidity and reducing vibration.

Ease of Operation

Centralized Lubrication: A standard centralized lubrication system oils slideways, leadscrews, and knee elevating mechanism with a single lever operation. This ensures proper lubrication distribution, reducing maintenance and enhancing operator convenience.
Hard Chrome Slideway Option: Optional hard chrome plated slideways offer extended accurate life. The Poeton-Tibon precision process provides uniform plating thickness, ideal lubricating properties, low friction coefficient, corrosion resistance, and exceptional wear resistance.

Higher Production Capability

Digital Read-Out Option: The 2-axis digital read-out system improves machining quality and production efficiency. It allows setting to zero or a predetermined reference datum, inch/metric switching, and features like absolute reference mark Memofix. System resolution is 0.005 mm (0.0002") or 0.01 mm (0.0004") with standard traversing lengths of X-axis 660 mm (26") and Y-axis 305 mm (12").
DRO System: Retro-fit available for complete DRO system installation.

Distortion-Free Clamps and Power Feed Options

Distortion-Free Clamps Special reed type distortion-free clamps prevent displacement during milling operations.

OPERATORSAFETY

Safety and Operator Convenience Features of Bridgeport Machines

Bridgeport machines are designed with a strong emphasis on operator safety and convenience, integrating several features to protect both personnel and equipment investments.

 Safety Features

Spindle Brake Rapidly stops the spindle and can be locked on for tool changing, ensuring safe handling during machine operation.
   
Slipping Clutch: Protects the quill from potential damage due to overload, enhancing the longevity of critical components.

Cutter Guard: Supplied as standard to prevent accidental contact with cutting tools, ensuring operator safety.

Traverse Handle: Automatically disengage when traversing, preventing unintended movements and enhancing control.

Knee Elevation Handle: Position may be reversed when not in use, allowing for easier operation and workspace management.

Electrical Interlocks: The feed cannot be started if the spindle is stationary, preventing accidental engagement and promoting safe operation.

Stop Button: A red mushroom-headed emergency stop button is prominently located on the control panel, enabling immediate halting of operations in case of emergencies.

Operator Convenience

All main controls are easily accessible from the front of the machine, including slide clamps for all three axes, enhancing operational efficiency and ease of use.

 Quick and simple selection of cross and longitudinal traverse is controlled by a graduated dial. Rapid traverse is easily activated via pushbutton for swift positioning.

The standard Bridgeport spanner fits all movement controls and locking bolts on the milling head, ram, turret, and ram adaptor, streamlining maintenance and adjustments.

-A single lever movement lubricates all slides, leadscrews, and elevating bevel gears, reducing maintenance time and ensuring optimal machine performance.

These features not only prioritize operator safety but also contribute to the overall efficiency and longevity of Bridgeport milling machines, making them a preferred choice in various industrial and educational settings worldwide.
Specification
VERALL SPACE REQUIRED 31 4mm
 Longítudinal traverse 760 mm
Hand only
 Power Feed on1y 675 mm
 Cross traverse 305 mm
Vertical traverse 405 mm
3 Number of tee slots 3
 Width of tee slots 16 mm
Centres of tee slots 64 mm
3/4 - 35 ipm Feed rate - long and cross 20 - 875 mm/min.
ínfínitely varíable
45 іpm Rapid traverse - 1on9 and 1143 mm/mín.cross Spíndle
R8 Taper R8

ACCESSOIRES
The comprehensíve range of accessoríes considerably extend the Bridgeport s basíc versatilíty. Most accessoríes may be retro-
fítted, thus allowíng the machíne s capabilitíes to accommodate changing production requirements.
Quíllmaster
The advantages of the quillmaster are quickly recognísed by tool and díemakers, as any corner wíth a small radíus can be finished milled to a degree of sharpness not previousty possible. The spindle housing of
the attachment may be adjusted to any posítion between vertical and horizontal and through 3600 0п the quill. By tilting the spíndle housing the insíde walls of an impression may be milled.
Precision built to rígid standards, the quíll master ís fítted with permanently 1ubricated precísíon bearíngs and a hardened ground spíndle.
The quillmaster gearíng provídes an íncrease of 50 over the machíne spíndle speed to permit the efficient use of small end mills.
Co11et capacities are 2, 3, 4 and 5 mm 1/8, 5/32 and 3/ı6 díameter.
The quiiImaster ríght angle attachment 
QRA increases even further the usefulness of the attachment. The QRA unít has permanently sealed bearíngs and has a 5 mm 3/ı6 diameter capacíty.
Equípment Cabínet 
Specífically designed to accommodate the small accessories and spíndle tooling of the 
Brídgeport machine, the cabínet has two large smooth action drawers, three shelves whích are pivoted for easy access and lockable doors. Provísíon is made for mounting the clamp set oп aп exteríor síde panel.
1ACCESSORIES
Right Angle Attachments for Milling
Heads
Ideal for machíníng pockets and cavities, these attachments facílitate míllíng, dríllíng, boríng and reaming at right angles to the spíndle of the míllíng head.
Two sizes are avaílable, the No. 3 attachment 4:3 speed reduction for relatívely heavy duty work and the No. 4 attachment 2:1 speed reduction for use in positíons that would be ínaccessíble to the larger No. 3 unít.
The cutter and drive spindles of both attachments are mounted in theír own antífríctíon bearings and are dríven direct from the R8 taper of the millíng head by a drive shaft. Mounting consísts of placíng the attachment on the quíll, securing the drive shaft by means of the spíndle draw bar a
3/8 R8 co11et ís requíred for the No. 4 unít and then tíghteníng the clampíng
screw to hold the attachment fírmly to the quíll.
Ríght Ang1e Arbor Support Bracket 
Thís unít ís used in conjunctíon wíth the No. 3 ríght angle attachment to cOnvert  the Bridgeport machíne to horizontal  millíng in a matter of mínutes. ideal for líght horízontal milling, gear cuttíng usíng a dívídíng head and many other jobs where aп arbor support at both ends ís helpful.
Arbors, complete wíth spacers and nuts, are available in different lengths and diameters as detaіled oп the price líst.
Also Avaílable:
Splash Tray
Cґoѕѕ Travel Stop
lnch/Metríc Dua1 Readíng Díals
F1ood Coolant System
Low Voltage Machíne Líghtíng

WORK HOLDING
Rotary Tables
A complete range of rotary tables ìs avaílable for all sizes of mílling machínes. Table can be supplíed with dírect or índirect índexing, vertícal and/or horizontal mounting, mechanícal or electrical operation and
in díameters up to 1000 mm 40 . Full detaíls are given in a separate brochure. Dívídíng Heads
A complete range of divídíng heads is available wíth centre heíghts rangíng from 80 mm 31/8 to 350 mm 14 and the optíon of fully uníversal, semí uníversal,  plain índexing and rapid indexing for eíther mechanical oГ electrical operation. Both single and multí-spíndle models are available. Full details are given in a separat brochure.
Vertícal Co11et Chuck Attachment
The size range provides collet capacity from 3 mm 1/8 to 75 mm 3 . A quíck síngle lever movement índexes the collet by a pre-determ ned amount.
Machíne Vices
Bridgeport plain and swível víces are of robust construction and the 25 mm 1 , 6 , leadscrew and self lubrícatíng phosphor bronze nut ensures smooth and
effícíent operat on. Precísion ground hardened steel v ce jaws wíth a maximum opening of 125 піm 51. The base of the plain vice has opposed tennõn slots to allow the více to be mounted parallel or at ríght angles
to the machíne table.
WORK HOLDING
Combínatíon Angle Plate and Sine Table 
The rígídly constructed unit ís very useful for easy and accurate p1ain or compound angle set-ups. The table has adjustable side supports and hinge bolts that can be tilted to ensure maximum rígídíty. By tíghteníng
two screws through the plate into the base, the unit becomes a solid angle plate wíth a 255 mm 10 síne Ьaг whích may be  detached or moved to the horízontal surface for plain or compound angle set-ups. 
The table workíng surfaces are:
Horizonta1 255 x 305 mm 10 x 12 .
Vertical 150 x 305 mm 6 x 12 .
The sine tab1e tee slot wídths are 13 mm
Clamp Set
The clamp set compríses, clampíng bars, bolts, connectors, tee slot nuts etc., and are arranged in a robust container to enable quick and easy selectíon. The container may Ьe used free-standing or mounted on a vertical surface usíng the two key hole slots províded.
SPINDLE TOOLING
Spíndle Collets and Adaptors
Fi8 Tapeг - avaílable from 2 to 20 mm
diameter in 1 mm steps 1/8 to 3/4 x
No. 2 Morse Tapeг - avaílable from 3 to 13 mm díameter in 1 mm steps τ/16 

Adaptors caп be supplíed to convert the R8 taper to No. 1 0г No. 2 Morse Tapeг.
Stub Arbors
R8 Taper - lgft and ríght hand thread,
supplíed complete with sØcers and nuts in the following díameters: 
Collet Chucks
Titanic - R8 Taper - complete wíth set of 1 1/4 collets .
Clarkson Autolock Chucks R8 Taper complete wíth set
11/4 , 3/ , 1/2, 5/g coilets or with 25 mm 1 co11et.
Drill Chucks 
Jacobs - R8 Taper - 13 mm 1/2 0г 20 mm 3/4 capacity.
Albrecht Keyless - R8 Tapeг - 10, 13 or 16 mm 3/8 , 1/2 oг 5/8 capacíty.
SPINDLE TOOLING
End Mill Holders
End mílls caп Ьe rigídly locked in these holders and the leadíng edge ís chamferred to allow max mum vision when machining pockets. The short overall Iength ensures that the too1 ís held as close as possible to
the spíndle bearíng thus ensuríng maximum rígidíty under cut. Sízes aгe 6, 
díameters.
Hígh Speed Flycutter
The Hígh Speed Flycutter ís counter balanced to províde faster machiníng wíth improved surface fínísh. Supplied complete wíth one unground solid carbíde cuttíng tool of general grade M10 . 
Addítíonal tools in packs of 5 caп be supplíed.
Boríng Heads
R8 Tapeг - No. 1 Boríng Head compríses 4
boring tools, 1 boríng bar, 2 Allen keys.
R8 Tapeг - No. 2 Boríng Head compríses 4 boríng tools, 4 boring bars, 3 A11en keys.
Shapíng Too1ѕ
For use with the type E shapíng and slottíng attachment. The set compríses 5 hígh speed steel tools of varying shapes and  sízes as indicated plus 2 bars and a specíal holder for síde mountíng ín the clapper box.
The extensíon bars and síde mountíng holder are desígned to take 5 mm 3/16 tool bíts.
B/ýdf the international name for qual ity mach ine tools

Bridgeport Machines: Leading Manufacturer of Machine Tools

Bridgeport Machines is one of the world's leading manufacturers of machine tools, offering high-quality milling machines distributed to over 75 countries worldwide. As an autonomous division of Textron Incorporated, Bridgeport operates from 13 locations globally, with facilities totaling 100,000 square meters and employing approximately 3,000 people.

Company Overview

Product Range: Specializes in high-quality milling machines at competitive prices.

Global Reach: Supplies machines to over 75 countries worldwide.

Ownership: Autonomous division of Textron Incorporated.

Locations: Operates from 13 locations globally, including production facilities in the USA and the UK.

European Headquarters

Location: Leicester, England.

Facilities: Features extensive production demonstration facilities and a well-equipped customer training school.

Customer Support: Utilizes a national sales force of qualified Sales Engineers who provide advice and recommendations to users.

Service: Offers factory-trained service facilities and support for after-sales service.

Products and Services

Precision Surface Grinders: Additionally produces a range of precision surface grinders.

Applications: Bridgeport machines are widely used in government, industry, and education sectors.

European Operations: Directly engages with users in the UK through a national sales force, providing tailored service and support.

Quality Assurance: Fully approved supplier of machine tools to the British Ministry of Defence.

Commitment to Excellence

Bridgeport Machines continues to innovate and expand its product offerings, maintaining its position as a trusted provider of high-quality machine tools globally. With a focus on customer satisfaction and service excellence, Bridgeport Machines stands out for its commitment to delivering reliable solutions across diverse industrial applications.

This overview highlights Bridgeport Machines' global presence, commitment to quality, and dedication to customer service, positioning it as a leader in the machine tools industry worldwide.