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POB 2
Grovespring, MO 65662

 

 

Bridgeport BRM
Master Milling Machine

 

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CNC RS232 Kits  Specialty Millers V2E3 Serial Numbers CNC Retro Fit

 Collets & Toolholders are available in our store

 

 

Around 1936 the Model M Head began to take shape. It was a new and improved version of the Model C

Bridgeport Model M "Master Drilling & Boring Head" pictured below was the new & improved design to the Model C & came with a few more distinct design changes that included 1/2 H.P Motor, with three matched pairs of spindle bearings. Three spindle tapers a Morse 2, B&S #7, & the Standard B-3. A Quill travel of 3 ½”, & two different heads altogether. The first was the standard 6 pulley with spindle RPM's of 275, 425, 700, 1050, 2100, 4250.

The other was the double pulley version. The housing was twice as tall & and gave the operator the extra speeds of 950, 1350, 2200, 3250, 6500, 12000. There were actually several different experimental versions made but since those engineers are all gone now it is hard to tell what they were

 The Model C head pictured below or (Master Milling Attachment) came about in the late 1920's & was produced by Bridgeport Pattern & Mold Works as an attachment to other popular Vertical & Horizontal machines in 1932.

The Master Milling Attachment came with a 1/4 H.P. motor with 6 spindle speed 465, 675, 1000, 1500, 2140, 4250. The quill taper was B-3. These heads included two matched sets of spindle bearings                                                                                   

 

 

 

The Master Milling Machine has a counter balanced spindle & quill, which provides the operator a fine sensitivity fell while milling, & especially drilling & boring.

 

 

The Bridgeport Series 1 Standard  9 x 36

MASTER TURRET MILL

Range

Spindle Range Cont.

Table Travel X = 24”

Controlled down feed range N/A

With 36” Table

Manual adjust N/A

Saddle Travel Y = 12”

Manual adjust N/A

Quill Travel 4”

Drilling Capacity

Knee Travel Z = 16”

Mild Steel (manual) ¾”

Ram Travel 12”

Mild Steel N/A

Throat Distance min 6 ¾”

Milling Capacity (mild Steel) 1cu. in/ min

Throat Distance max 18 ¾”

Boring Range (mild Steel) to 4 in dia

Table to Spindle 2 ½”

Spindle Diameter 1.375”

Max weight of workpiece 750 lbs

Quill Diameter 2.5625”

Table

Milling Feed Rate (X  & Y axis)

Overall size 9” X 36”

Standard Infinitely variable ipm

T Slots 3 every 2 ½” centers

Power Feed Infinitely variable ipm

T Slots Size ⅝”

Space Weight

Height above Floor Max 47 ¼”

Floor area 7’ x 10’

Spindle (M Head)

Height 82 ½”

Power Rating 1/2 hp  

Net weight 1950 lbs

Taper M2

Shipping weight 2400 lbs

Speed Range   275 – 4250                                              

Electrical 230/460 60 hz 3 phase

 


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Machine Manual Services POB 2 Grovespring, MO 65662