"The pencil sharpener is about as far as I have ever got in operating a complicated piece of machinery with any success."
Robert Benchley
The Quorn TCG
The Quorn is a tool and cutter grinder designed by D.H. Chaddock and published as a series of articles in the British magazine Model Engineer in 1974. Follow along as I attempt to build one! |
Quorn Tool and Cutter GrinderOverviewConstruction Logs Recently Updated Logs The Ball Handles The Base The Tooth Rest The Wheelhead The Workhead The Spindle The Spiraling Toolholder The General Purpose Toolholder Martin Model 5C Spiraling Toolholder Martin Model 5C General Purpose Toolholder The Finished Quorn Links to Resources The CAD Files Disclaimer
Overview If you are interested in making your own Quorn, castings, plans, and a reprint of the original articles in book form are available from sources listed in the appendix. Now that you know what a Quorn is, follow along as I attempt to turn some rough castings into a useful machine. Prior to cutting metal, I like to create a solid model of the parts in AutoCAD. For me, the process of creating the individual parts in CAD is very much like the machining process to fabricate the actual parts. I find that after making the CAD model, I have a much better understanding of the relationship between the individual parts, as well as very good understanding of the sequence of machining operations that will be needed to actually fabricate the part. My model is available for download. Construction Logs Recently Updated Construction Logs
Guide to the construction logs below:
Split Cotters
100 Left Base
101 Right Base 102 Rear Bar 103 Front Bar 104 Wheelhead Column ~105 RH End Cap ~108 Micrometer Body ~109 Micrometer Thimble ~110 Micrometer Screw ~119 Dust Cover ~121 Felt Washer
200 Collar
~201 Bracket ~202 Belt Guard ~203 Wheel Guard ~206 Lifting Nut ~207 Index Pin ~208 Friction Pad ~209 Index Ring ~210 Motor Plate ~211 Motor Plate Bolt ~212 Belt Cover Screw ~213 Pivot Screw ~217 Adjusting Screw ~218 Motor Pulley ~220 Belt ~221 Motor
~300 Base
~301 Lever ~302 Tilting Bracket ~303 Rotating Base ~304 Thrust Washer ~306 Tee Bolt ~307 Stop ~308 Adjusting Screw ~309 Lock Nut ~310 Collet ~311 Pivot Bolt ~316 Dust Cover ~317 Felt Washer
~401 Body
~403 Bearing ~404 End Cap ~405 Spacer ~406 Spring ~407 Spring Box ~408 Pulley ~409 Key ~410 Spindle ~411 Nut ~412 Drawbar ~413 Arbor ~414 Washer
~312 Short Bed Bar
~500 Bracket ~501 Stop Bar ~502 Guide Bar ~503 Guide Pin ~504 Spindle ~505 Closing Ring ~506 Hob ~507 Hob Nut
~312A Long Bed Bar
~510 Bracket ~511 Collet Nut ~512 Split Collet ~513 Index Plate ~514 Back Plate ~516 Index Pin ~519 Index Knob ~521 Tool Holder ~523 Collet Spindle ~524 Spindle Draw Screw ~525 Morse Taper Arbor ~526 Dead Arbor ~527 Lock Collar ~529 Tailstock ~530 Tailstock Center TO DO
Appendix Following is the full list of Model Engineering articles covering the Quorn:
Quorn castings, plans, and the above articles reprinted in book form are available from the following sources (and probably others):
CAD Files
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Disclaimer and License
All material, including the CAD drawings, relating to the construction of the Quorn presented on this site is free to use any way you see fit. However, no guarantees are made regarding the accuracy or correctness of the material presented here. |
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