DynaPrep MDSF 1420 Split Frame Clamshell Pipe Cutter/Beveler Base Kit

DynaPrep MDSF 12 Inch

DynaPrep MDSF Split Frame 1420 14in-20in OD (DN350 - 500) Base Kit, rotating split ring style OD mounted machine tool, is designed to perform

  • as an inline Pipe cutter - (parting), double parting (utilizing two cutting blades) or simultaneous cold cutting and beveling of inline pipe and elbows
  • as an inline Pipe beveler, beveling, compound beveling, and creating J-Preps with specific radius and precise lands, ideal for weld preparation
  • Pipe End Prep Counterboring of inside mating surfaces prior to welding
  • as a Flange Facer to face smooth flange surfaces, record groove flanges, and plunge cut RTJ ring grooves
  • Heavy Wall pipe machining up to a 2.5in (63mm) wall thickness

The DynaPrep MDSF Base kit includes most commonly specified components, just add a drive motor and tooling. Less expensive and easier than ordering components ala carte, these base model MDSF Kits are ideal where multiple ring sizes for varying pipe diameters are required onsite.

Kit is complete with

  • DynaPrep Model 1420 Rotating Ring Set
  • 6B Spline Drive Pinion Housing
  • (2) Rapid Adjust 2.5in Stroke Tool Slides with no-time starwheel feed
  • Indexed Trip Assembly
  • Spare Fastener Kit
  • Operating hand tools
  • Manual
  • Storage Case

Wachs DynaPrep MDSF Medium Diameter split frames, often referred to as clamshells, are named for their ability to split in half for mounting to the outside of inline pipe. Each Wachs Split Frame uses a proven cold cutting machining process to cut and bevel pipe. It maintains the low clearance design of our previous LCSF series, but builds on that legacy with dozens of innovations and features to make it more powerful, more versatile and faster to setup and operate. It redefines the standard in portable, cold cutting machine tools.


E.H. Wachs DynaPrep MDSF split frame clamshell machine tools are the foundation of a complete machining system that performs a wide range of field machining applications. DynaPrep pipe weld prep machine tools can perform precision inline pipe cutting, squaring of pipe ends, and destructive cutting of corroded or damaged pipe and pipelines.

A pipe cutter by definition, the DynaPrep MDSF pipe cutting machine can simultaneously cut and bevel inline pipe, and when equipped for pipeline applications can quickly prep thin wall and out of round piping. For machining of heavy wall pipe or high alloy materials, additional modules are available that mount without modification to the standard ring set.

Additionally, each MDSF can act as a pipe beveler, beveling inline pipe, open pipe ends and chamfering pipe and casing conductors. In applications where a compound bevel is required, the DynaPrep can act as a compound beveler, beveling with form tools (where the tooling has the finished profile) or single point machining complex preps such as J-prep bevels.

Going far beyond basic cut and bevel capability, the DynaPrep MDSF can be equipped with FFC and FFR modules for flange facing, converting the DynaPrep from a pipe cutter into a flange facer to face and resurface flanges, avoiding the need to bring specialized facers onsite. As a flange resurfacing machine, the DynaPrep MDSF can perform bolt face resurfacing, raised face resurfacing, record grooving, and RTJ ring groove creation and resurfacing. For counterboring pipe, the DynaPrep MDSF series of rotating lathe machine tools can be outfitted with counterbore modules, enabling counterboring and deep counterbore machining of pipe ends for tapers and transitions. Additionally, a WCR module is available for weld crown removal, and an end mill system module is offered that cuts pipe by milling rather than lathe pipe cutting.


Manual Product Line Tooling Sheet Installation Guide Maintenance Manual