
It orbits. It trues.
ORBITRUE is the Maucotools family of flange facing machines: they clamp in the bore, orbit around the axis and re-machine the sealing face directly on the plant, without dismantling the line.
Six sizes cover flanges from 1" to 80". The model number is the maximum facing diameter in inches: choose the size by diameter, then the drive.
6
sizes
1–80"
facing diameter
5
drives
HOW IT WORKS
The principle is the same across the family, from the 19" manual to the 80" motorised machine: a fixed axis in the bore, a rotating arm, a tool feeding radially.
Mounting is internal (ID mount): the machine centres and locks in the flange bore, which becomes the axis of rotation. No external reference to build.
The arm rotates around the axis, by hand on the ORBITRUE 19 Manual and motor-driven on the motorised sizes, carrying the tool across the whole face.
At every revolution the tool feeds radially: the result is the continuous spiral (“phonographic”) finish required on gasketed sealing faces.
THE RANGE
Start from the diameter of the face to be machined: each bar is the facing range of one size. Where two sizes overlap, choose by drive and by the space available.
Logarithmic diameter scale. For sizes marked “coming soon”, ask our sales team about availability and lead times.

Ø 25–482 mm
Re-faces flange sealing faces from 1" to 19" directly on the plant, with no motor and no power supply.
See the product page
Ø 457–1016 mm
Facing, chamfering and bevelling of flanges from 18" to 40" (Ø 457–1016 mm), horizontally or vertically.
See the product page
Ø 1016–2032 mm
Facing, chamfering and bevelling of flanges from 40" to 80" (Ø 1016–2032 mm), horizontally or vertically.
See the product pageMANUAL OR MOTORISED
ORBITRUE 19 Manual is hand-operated: no power supply, a 331 × 191 mm footprint, transport in a carrying case. It is the machine for small and medium flanges and for quick maintenance jobs.
Five motorised sizes cover flanges from 1" to 80". Rotation and feed are constant, so the finish is repeatable from one revolution to the next and from one flange to the next.
DRIVES
Every motorised size is available with four drives: the mechanics do not change, you choose the energy available on site.
Electric gearmotor: the simplest choice in the workshop and on site, wherever mains power is available.
Compressed-air motor, for plants where the available energy is the air line.
Hydraulic motor with power pack: high torque and continuously adjustable speed.
Numerically controlled motorised axes, for repeatable cycles and programmed profiles.
SWITCH SYSTEM PLATFORM
ORBITRUE 40 and ORBITRUE 80 are built on the Switch System: with the Switch Kit the flange facing machine turns into a large-diameter line boring machine, and back again. Whoever buys the flange facer already owns the core of a second machine.
Discover the Switch SystemVIDEO
APPLICATIONS
Line flanges, valves and nozzles: restoring the sealing face during shutdowns and maintenance, without taking the part to the workshop.
Heat exchangers, pressure vessels, pumps and turbines: large-diameter flanges machined in place.
On-board piping and equipment, where dismantling and transport cost more than the job itself.
Mobile workshops and maintenance contractors: a scored or corroded face is recovered on site.
FREQUENTLY ASKED QUESTIONS
It re-machines the sealing face of a flange damaged by corrosion, scoring or distortion, directly on the plant. The machine clamps in the flange bore, orbits around its axis and restores flatness and surface finish without dismantling the line.
Tell us diameter, material and position: we reply with model, drive and quotation.