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Grovespring, MO 65662

 

 

Bridgeport Series II (2)

 

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Bridgeport Series II Standard

Rugged 4 HP 4J variable speed head  was standard.  Spindle speeds range infinitely variable from 50-3500 rpm. #40 taper standard (My Preference Universal #300), & #40 quick­change spindle and quill power feed  was optional.  Head adjusts 90˚ left or right, 45˚ front or back.

V-ram Standard. 360˚ rotation. 16" in/out travel.  4¼ ” diameter chrome-plated quill.

Box ways on saddle and knee.  Gibs hand-scraped for precision “It’s a Bridgeport”. One-shot lubrication system.  All standard. Optional chrome plated saddle and knee ways. There were a few of these machines made with a ram that was machined for mounting the 2J or Variable speed head on the rear. Enabling the operator greater diversity. But at $65,000 for just the base machine with chrome who could have afforded the optional ram.

At the time of my writing this no Bridgeport Series 2 Standard or Special is being produced.

X-Y axis feed rates infinitely variable from .38 to 24 ipm.  Z­ axis feed rate infinitely variable from .19 to 12 ipm.  Power feed on all axes.

MACHINE DATA

Range

 

Controlled Down Feed Range

 

Table travel (X-axis)

30 in.

Manual adjust

0.6-2.5 ipm

Saddle travel (Y-axis)

15 in.

Drilling Capacity

 

Quill travel

5 in.

Mild steel (manual)

1 ¼” in.  Diameter

Knee travel (Z-axis manual)

16 in.

Mild steel (power feed)

¾” in. 

Ram travel (rack & pinion)

16 in.

Milling Capacity-mild steel

4 cu. in./min

Throat distance (min) (V-Ram)

10 ⅝ in.

Boring Range-mild steel

To 8 in. diameter

Throat distance (max) (V-Ram)

26 ⅝ in.

Spindle diameter

2 ⅛ in.

Table to spindle nose gage line

1 in. (min)

Quill diameter

4 ¼ in.

Max. weight of workpiece

1500 lbs.

Milling Feed Rate

 

Table

 

X & Y axis

3/8-24 ipm

Overall size

11 x 58 in.

Z-axis

3/16-12 ipm

T-slots-three

2 ½ in. centers

Milling Rapid Feed Rate

 

T-slot size

⅝ in.

X & Y axis

24 ipm

Height above floor (max)

48 ¾  in.

Z-axis

12 ipm

Spindle (in 4J Head)

 

Space and Weight

 

Power rating

4 hp

Floor area

7 x 10 ft

Taper

No. 40 milling machine*

Height

                    93 in.

Speed Range

 

Net weight

5220 lbs.

Low-infinitely variable

50-450 rpm

Shipping weight

6300 lbs.

High-infinitely variable

450-3500 rpm

Electrical-60 Hertz,

208/230/460/575 volts

*#40 quick change spindle was an Option

 

Bridgeport Series II Special

2 HP 2J head with R-8 taper is standard (My Preference Universal #200) .  For more adaptability the 1/3 HP Model E vertical shaper head can be mounted on the back of ram and posi­tioned over the worktable by rotating the ram 180º. 2J head adjusts 45º front and back, 90º left or right.  

All Series 2 Specials are (or should be equipped with X Powerfeed)

The Knee Pedestal on these machine are "air assist". You should be able to crank the knee upward with just 1 finger. It like driving a John Deere.

These machines are big although they don't look it they are twice the size of a Series 1 & dwarf one if they are sitting side by side. The table is 11" X 58" and near 7 feet long with the handles & powerfeed. These and the Series 2 Standards were basically custom built machines. They were never put on an assembly line, like the Series 1 machines were. It is very rare for one of either of the Series 2's to have been built with errors, blemishes, mishaps, or what have you. 

Bridgeport charged a lot on money for these & they wanted them built right. These were typically built by one guy working on them at a time, & since the employees had there own personal stamp, and they did not want management coming back to them over a sloppy job.

This Miller Also has Box ways on saddle and knee

MACHINE DATA  

Range

 

Controlled Down Feed Range

.0015 in

Table travel (X-axis)

33 in.

Manual adjust

.003 in / .006 in

Saddle travel (Y-axis)

15 in.

Drilling Capacity

 

Quill travel

5 in.

Mild steel (manual)

1 ¼” in.  Diameter

Knee travel (Z-axis manual)

12 in.

Mild steel (power feed)

¾” in. 

Ram travel (rack & pinion)

17 in.

Milling Capacity-mild steel

2 cu. in./min

Throat distance (min) (V-Ram)

6 in.

Boring Range-mild steel

To 6 in. diameter

Throat distance (max) (V-Ram)

23 in.

Spindle diameter

1 ⅞ in.

Table to spindle nose gage line

4 in. (min)

Quill diameter

3 ⅜ in.

Max. weight of workpiece

1500 lbs.

Milling Feed Rate

 

Table

 

X & Y axis

3/8-24 ipm

Overall size

11 x 58 in.

Z-axis

3/16-12 ipm

T-slots-three

2 ½ in. centers

Milling Rapid Feed Rate

 

T-slot size

⅝ in.

X & Y axis

.75-35 ipm

Height above floor (max)

46 ½ in.

Z-axis

.3-20 ipm