PB 50 /60 /70

PB-50 /PB-60 /PB-70

Proking Heavy Duty Hollow Spindle Lathe

 

  • One piece bed, floor type casting.
  • 2 shear bed way with extra way supporting the apron.
  • All ways are hardened and ground.
  • Alloy steel spindle with opposed taper roller bearings.
  • Hardened and ground gears, shafts and cross slide ways.
  • Electromagnetic spindle brake.
  • 18-speed geared headstock.
  • 6-way rapid traverse and power feed to top slide.
  • Totally enclosed universal inch / metric gear box.
  • Carriage position device.
  • Dual voltage spindle motor, 30 to 50 HP.
  • Pressurized one shot lube system for cross slide and carriage.

 

SPECIFICATIONS

 

Capacity

PB-50

PB-60

PB-70

Swing over bed
50-1/8"
(1275 mm)
60-1/8"
(1527 mm)
70-1/2"
(1790 mm)
Swing over cross slide 37-3/8"
(950 mm)
47-1/4"
(1201 mm)
57-3/8"
(1460 mm)
Swing over gap
70-1/2"
(1700 mm)
80-1/4"
(2040 mm)
90-1/2"
(2300 mm)

Length of gap from head stock

23-3/4" (600 mm)

Center distance

60" - 800" (1500 - 20,000 mm)

Headstock



Spindle nose

A2-11, A2-15, A2-20, A2-28, SPECIAL
Spindle bore
153 mm, 230 mm, 318 mm,
360 mm, 410 mm, 510 mm
Spindle speed
5-630, 4-500, 3-400, 2.5-300, 2-250, 1.5-180
Main motor
30HP (std) 40/50 HP (opt)

Threads and Feeds



Range of threads
2/1-28 TPI (60), 1-56 mm (60)
Threads cutting (NO.) range - M.P.
M.P. 0.25 - 14 (60)
Threads cutting - D.P.
D.P. 0.2 - 112 (60)
Longitudinal, cross
0.018 IPR-0.1 IPR, 0.045 ~ 2.55 mm
Cross feeds
0.01 IPR-0.05 IPR, 0.023 ~ 1.28 mm
Rapid traverse longitudinal, cross
 80" - 40"/min (2000 - 1000 mm/min)

Carriage

 
 
Cross slide travel
31-1/2" (800 mm)
Compound slide travel
500 mm

Trail Stock

 
 
Diameter of quill
5-3/4" (Ø145 mm)
Taper of center
MT #6
Bearing surface on ways
23-5/8" (250 mm)

Bed

 
 
W (auxiliary guide)
28"(32")/712 mm (812 mm) 
Net Weight
30,000 lbs (13,630 kgs)
32,250 lbs
(14,660 kgs)
34,500 lbs
(15,680 kgs)

 

Can Perform oblique cutting with standard automatic feed.

 

Design and specifications are subject to change without prior notice.

 

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