Portable Gantry Mill — Heavy Duty

The PGM-HD is Mactech’s heavy-duty gantry mill for on-site milling, drilling and machining jobs that are too big to move and too critical to compromise. Shipbuilding. Power generation. The HD extends in 4-foot rail sections for as long as your job needs for an extra 47.75” of travel per rail. To date, our longest customer build ran 12’ across three sections. And there’s no engineering reason to stop there.

  • Technician in safety glasses monitors the Mactech PGM-HD portable gantry mill as it face mills a steel plate
  • Mactech PGM-HD portable gantry mill with face mill cutter positioned over a steel plate on a shop floor work table
  • End of the PGM-HD gantry beam showing the red Mactech M logo and ball screw drive, with the milling head behind
  • Close-up of the PGM-HD face mill cutter machining a steel plate, with metal chips scattered across the table
features
specifications
Two Mactech technicians assemble the drive shaft beneath the PGM-HD gantry beam on a shop floor work table

How the PGM-HD holds the line

Most competitor portable gantry mills drive the X-axis with a ball screw on one side. That works at fixed lengths, but when you start adding rails for a bigger job, the machine gets harder to control. The driven side advances while the other drags along, giving the gantry more opportunity to skew as it travels.  On the Mactech PGM-HD, a rack-and-pinion drives each rail, with both sides tied together by a driveshaft running the width of the machine. Both sides move together. Both sides stay under positive drive. And when you add an X-axis length, you’re not asking one side to follow along. The PGM-HD stays square and holds the line.

Key Features

  • Rail systems align themselves with a bullet-nose-and-bushing system
  • Cat 50 taper shaft spindle with a duplex/triplex bearing system
  • Cantilevers for extra flexibility when there’s no room to spare
  • A swiveling head for precision tramming keeps long cuts flat
  • Comes with an 8-foot X-axis starter kit and a choice of 6’, 9’ or 12’ Y-axis beams
  • Electric or hydraulic drive and an optional Z-axis power feed
  • Typical setup ranges 4 to 6 hours

PGM HD specifications

Y-axis beam — 6' Y- axis beam — 9' Y- axis beam — 12' X-axis rail (single) X-axis rail (each additional) Z-axis

Travel

43″

79″

115″

30.75″

47.75″

8.6″

Machining range

55.5″

91.5″

127.5″

43.25″

47.75″

N/A

Cantilevered reach

37.5″

73.5″

109.5″

N/A

N/A

N/A

Width/length

78″

114″

146″

47.75″

47.75″

35″

Weight

1,884 lbs.

2,233 lbs.

2,582 lbs.

213 lbs.

213 lbs.

301 lbs.

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