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male H.H. Roberts Machinery Limited
1324 Matheson Blvd E., Mississauga, Ontario, Canada. L4W-2Z7, Fax 905-624-9065
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Freeport
Double Column Surface Grinders

51" wide x 63"    to    161" long:
Freeport 48 x 60 double column CNC surface grinder
The Freeport SGS-1512-AHD Surface Grinder
download the double column grinder catalog

View a video on the Freeport double column surface grinders. Well produced and in English)
This shows grinding on several different models of the double column machines.  Work shown includes flat thin plates, bases, columns and tables of machining centers, V-bed lathes, boring mill sub-tables etc.
Click on the icon below.
video on Freeport double column grinders

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SGS-1512
AHD / PNC
SGS-2012
AHD / PNC
SGS-2512
AHD / PNC
SGS-3012
AHD / PNC
SGS-4012
AHD / PNC
Maximum grinding surface
1300 x 1600
51.2" x 63"
1300 x 2100
51.2" x 82.7"
1300 x 2600
51.2" x 102.4"
1300 x 3100
51.2" x 122"
1300 x 4100
51.2" x 161.4"
Working Surface of table
1200 x 1500
47.2" x 59.1"
1200 x 2000
47.2" x 78.7"
1200 x 2500
47.2" x 98.4"
1200 x 3000
47.2" x 118"
1200 x 4000
47.2" x 157.4"
Max. Horizontal travel of table
1700mm
66.9"
2200mm
86.6"
2700mm
106.3"
3200mm
126"
4200mm
165.4"
Max. Cross travel of table
1400mm
55.1"
Distance between table surface and spindle  center
950mm
  37.4"
Table speed
5~25M/min    200~1000 IPM
Automatic cross feed of saddle
0~25mm      0" ~ 1"
Down feed handwheel min  scale
0.005mm    0.0002"
Cross feed handwheel per graduation
AHD   0.02   0.001"   
PNC   0.005     0.0002"
Cross feed handwheel per rev
5mm    0.2"
Longitudinal travel adjustment
150~1800mm
5.9" x 70.9"
150~2300mm
5.9" x 90.6"
150~2800mm
5.9" x 110.2"
150~3300mm
5.9" x 129.9"
150~4300mm
5.9" x 169.3"
Cross feed travel adjustment
0~1400 mm  
0" ~ 55.1"
Spindle motor

standard 20 Hp   Optional  30 Hp

Hydraulic pump motor
10 Hp
15 Hp
Cross feed motor
AHD      1/4 Hp 
PNC    3 Hp AC Servo
Down feed motor
AHD    850W DC Servo
PNC    850 W AC Servo
Grinding wheel OD x T x ID
Standard    510 x 50 x 127mm         20" x 2" x 5"
Optionally   510 x 75 x 203.2mm      20" x 3" x 8"
Spindle speed
1,250 RPM
FLOW RATE of coolant pump
60 l/min
90 l/min
Max. load capacity addition to magnetic chuck
2,100 kgs
4,620 lbs
2,800 kgs
6,160 lbs
3,500 kgs
7,700 lbs
4,200 kgs
9,240 lbs
4,900 kgs
10,780 lbs
Net Weight
12,000 kgs
26,400 lbs
14,000 kgs
30,800 lbs
16,000 kgs
35,200 lbs
18,000 kgs
39,600 lbs
20,000 kgs
44,000 lbs