Clamshell lathe cutting through a large steel pipe marked for repair, with chips around the cut
Clamshell pipe lathe
Mactech USS Clamshell Portable Lathes
816USS to 836USS split-frame lathes for pipe from 10 in to 36 in OD
Mactech USS clamshell portable lathes sever, bevel and prepare pipe ends from 10 in to 36 in OD on site. They pair the low clearance of the LC series with extra thickness and strength for larger pipe and cold cutting.
Manufactured byMactech
10–36 inPipe OD range across the series
7 models816USS to 836USS
¾–1 inStandard tool bits accepted
Dual bearingSystem for tool rigidity
Overview
More strength for mid-size pipe
The USS series combines the compact clearance of the LC clamshells with extra thickness and strength for larger pipe. The lathes handle severing, sever and bevel, and end preparation on pipe from 10 in to 36 in OD.
A dual-bearing system gives tool rigidity and long machine life, which allows cutting and beveling at the same time. The build allows spark-free cold cutting, so the lathes suit hazardous environments.
Seven models cover the range: 816USS (10 to 16 in), 820USS (14 to 20 in), 824USS (18 to 24 in), 828USS (22 to 28 in), 830USS (24 to 30 in), 832USS (26 to 32 in) and 836USS (30 to 36 in).
The tool holder accepts standard ¾ in to 1 in tool bits. Air drive systems include an air caddy with filter and oiler, and custom setups and drives are available.
Applications
Typical USS clamshell jobs
USS clamshells work on pipe that stays in place, from pipeline repairs to flange work.
Tool bit on a clamshell lathe machining a clean bevel on the end of a rusty steel pipe
Clamshell lathe with two tool slides fitted on a pipe end supported by a steel stand in a workshop
Rotomill attachment on a clamshell ring machining the face of a large bolted flange
Yellow do not touch safety guard labelled 824USS fitted on a clamshell lathe ring
Pipeline repair cuts
Severing pipe sections in the field so a damaged length can be removed and replaced.
Weld bevels
Simultaneous cutting and beveling to prepare pipe ends for welding.
Flange facing
With the rotomill attachment, the clamshell can machine a flange face.
Hazardous environments
Spark-free cold cutting where hot work is not wanted.
Features
USS series features
- Severing, sever and bevel, and end preparation for pipe from 10 in to 36 in OD
- Dual-bearing system for tool rigidity and long machine life
- Portable, lightweight, low-clearance split frame
- Tool holder for standard ¾ in to 1 in tool bits
- Air caddy with air filter and oiler included with air drive systems
- Custom setups and drives available for the application
- Accessories include counterbore and rotomill attachments and a remote tripper and guard
Benefits
What it brings to the job
Pipe is cut and prepared for welding in one setup
Cold cutting suits hazardous environments
Fits tight spots around large installed pipe
Seven sizes let you match the lathe to the pipe
Cutting pipe from 10 to 36 inches on site?
Share your pipe sizes, wall thickness and site conditions, and our Machinery team will help you select the right Mactech USS clamshell lathe.
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