Portable universal router can cut holes of large diameter and irregular shapes, machine recesses, and drill holes with certain edge-distance limitations. Rectangular and round holes may be cut without a template

Pesch, W. A.

English

NASA Technical Reports Server

June 1970	 Brief 70-10313 
NASA TECH BRIEF 
T •-'	 ;:.	 . 
NASA Tech Briefs announce new technology derived from the U.S. space program. They are issued to encourage commercial 
application. Tech Briefs are available on a subscription basis from the Clearinghouse for Federal Scientific and Technical 
Information, Springfield, Virginia 22151. Requests for individual copies or questions relating to the Tech Brief program may 
be directed to the Technology Utilization Division, NASA, Code UT, Washington, D.C. 20546. 
Universal Router Concept 
A portable universal router, as shown in the draw-
ing, could perform such tasks as cutting holes of large 
diameter and irregular shapes, machining recesses, 
and drilling holes with certain edge-distance limita-
tions. Mounted perpendicularly above the workpiece 
is a high-speed electric router motor. The motor hous-
ing is mounted on the top of a cylindrical tool housing 
which rests on the workpiece. The housings are cou-
pled so that the router may be moved in the x-y plane. 
The router cutter is attached to and in line with 
the motor shaft. Cutter depth control is provided 
through a micrometer adjustment on the motor hous-
ing. Hole and recess size and configuration are con-
trolled by a template mounted on the tool housing, 
and are limited only by the availability of templates 
and by the size of the router itself. Close tolerance 
control of hole dimensions, including square corners, 
is maintained by appropriate selection of roller size 
and cutting tool configuration. Rectangular and 
round holes may be cut without a template.
The cutting process is one of routing chips of a 
controlled size to assure ease of chip collection. An 
impeller on the router motor shaft directs the chips 
toward the chip collector. The router is attached- to 
the surface of the workpiece by a suction gasket on 
the bottom of the cylindrical tool housing when oper-
ating in air, and by surface bonding when operating in 
a vacuum. 
Notes: 
1. Although originally conceived as a tool for use in 
space, this router might also be employed as a gen-
eral-purpose tool to aid in the on-site modification 
of large structures in construction trades or in heavy 
industry. 
2. This development is in the conceptual stage only, 
and as.of the date of publication of this Tech Brief, 
neither .a model nor a prototype has been con-
structed. 
3. No additional information is available. Specific 
questions, however, may be directed to: 
Technology Utilization Officer 
Marshall Space Flight Center 
Huntsville, Alabama 35812 
Reference: B70-10313 
Patent status: 
Inquiries about obtaining rights for the commercial 
use of this invention may be made to NASA, Code 
GP, Washington, D.C. 20546.
Source: W. A. Pesch of 
Hayes International Corporation 
-	 under contract to 
Marshall Space Flight Center 
(M FS-20756) 
Category 07 
This document was prepared under the sponsorship of the National 
Aeronautics and Space Administration. Neither the United States 
Government nor any person acting on behalf of the United States
Government assumes any liability resulting from the use of the 
information contained in this document, or warrants that such use 
will be free from privately owned.rights. 
IP
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Universal router concept

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