Quorn tool and cutter grinder plans

Preparing vegetables with a dull knife is laborious, dangerous and frankly, unsatisfying. Using a keenly ground blade makes all the difference. In just the same way, turning and milling with perfectly ground tools and cutters will add finesse to your work and a Michelin star to your workshop!. Everyday turning becomes hugely enjoyable with strong roughing and keen finishing tools that can be quickly touched-up.

Fits and finishes become what you've always dreamed of and now's the time to experiment with tangential tools, high rake edges, chip breakers, crested threads, form tools and V-form parting blades. Perhaps you need a 0. Tools for these features can't be bought, however they can be made quickly and accurately on the Quorn, with reliefs, rakes and cutting angles adjusted for best results in any material.

Less than 5 minutes work will return the face of an end mill to "better than new" - 5 more minutes and the helical edges can be restored to surgical condition. End mills, dovetail cutters, form gear cutters and horizontal milling cutters can all be restored to their razor-sharp beginnings. Once you get the taste of it, tapered, ball end and radiused cutters can all be re-sharpened or made from scratch. Those of us with Milling Machines seldom push our cutters to the limit.

Instead, we adopt those tiny, slow "nibbles" - not daring to risk a whole weekend's work waiting for a sharp, new cutter to arrive. And yet, this hesitant approach can't really produce the accuracy and finish that our work deserves.

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Being able to properly regrind cutters is much more than a matter of economy - it affects the whole way we attack a job! They can also be modified for counter-boring, spot facing or sheet metal work. Centre punches, screwdrivers, hacksaw blades, knives, chisels, plane irons, scribers, rotary and keyway broaches, scrapers, taps and even dies are all within the scope of the Quorn. Small cylindrical parts can be ground, by rotating them against the wheel, to a precision of "tenths" microns.

Hardened valves, bearing surfaces, tapered pins are all straightforward - as are bores and thrust faces. More adventerous users have attached their Quorn Wheelheads to the lathe and mill, allowing them to be used as Tool Post and Surface Grinders! Since its launch inthe Quorn has achieved legendary status as the ultimate project for the home workshop.

Quorn Tool and Cutter Grinder

Recognised as the embodiment of great design, the Quorn incorporates so many fine ideas, it is difficult to single one out. It has become a lasting tribute to his prowess as a professional engineer.A tool and cutter grinder is used by machinists to create new cutting tools and sharpen old ones to remove metal when machining parts. In Professor D. Chaddock saw a need for an inexpensive tool and cutter grinder for the home hobby machinist and the Quorn TCG was born.

The fabrication of the Quorn was originally covered in a series of articles in the British publication Model Engineering. 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. 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.

On the left in each group is an image of the CAD model for that part group. Moving your mouse over the individual part links to the right of the image will highlight that part in the model. If the part has a construction log, you can click on the part number link to go to the log. The Ball Handles. Fabricating the ball handles is a right of passage, so follow my ascension into the ranks of the worthy. Split Cotters.

The cotter page details the creation of the cotters and the modifications made to the castings and design to accommodate them.

DIY Cutter Grinding BH

The Base. The Tooth Rest. The Wheelhead. The Workhead. The Spindle. The Spiraling Toolholder. The GP Toolholder. Quorn castings, plans, and the above articles reprinted in book form are available from the following sources and probably others :.

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.Tool and cutter grinders have been around in one form or another since there has been machine tools.

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Many of the well known brands of American, English and some European manufactures of lathes, shapers, milling machines and surface grinders etc produced some form of T and C grinder, many of which being very heavy and substantial and indeed machine tools in their own right! Some were also incredibly sophisticated for the era in which they were produced.

The Acto tool and cutter grinder was designed in Australia in response to our needs in a busy tool room for a versatile quality machine capable of resharpening existing lathe and milling machine tooling to precise specifications and also for the production of custom grinding of speciality tools, jigs and fixtures, form tools etc. There notably few T and C grinders in plan form to meet the criteria we required, the obvious exception being the well renowned Quorn, but our necessity was to design a machine that would not take forever to build and would still have the precision required to meet our needs.

Many plans call for the purchase of expensive castings.

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Other than the cost involved here, the further cost is the freight to land these at your doorstep. The Acto grinds the end cutting face and also the side helix of end and slot mills.

Grinds radiuses on all manner of cutting tools, from simple lathe tools to the more complex tooling jigs and form tools. Sharpens drills up to 25 mm straight shank or 23 mm 2MT.

quorn tool and cutter grinder plans

Also sharpens slitting saws up to mm diameter, side and face cutters, plus a huge range of general workshop equipment. Many woodworking tools may also be sharpened in the Acto. Grinds all manner of carbide tools with the correct wheel on grinder. Unlike many engineering drawings which complexity requires hours of pouring over detailed data, the plans for the Acto are probably the most user friendly you will ever come across.

DIY Tool and Cutter Grinder Idea Notebook

They are simple and easy to understand with every single component drawn separately and then redrawn as an assembly with either one or up to six views. Plus, the Actowith its unique design, solves many of the problems associated with using your existing workshop grinder as a grinding head. Also there are over pages of individual drawings, 16 pages of detailed machining, assembly and operating instructions, which makes the building of the Acto easy for the novice or competent machinist alike.

SKU: acto-dnld Category: Uncategorized. There are no hidden extras.This is the page for the Quorn tool and cutter grinder, something I should have put together a long time ago. This will be the most complicated piece of equipment I've tried to make so far, it's anybodys guess how long it will take to finish The bits all came from Model Engineering Services who supply the casting kit and can optionally supply the other stuff like the motor and grinding wheels.

These pages are maintained by Duncan Munro. Warning: These pages consist of images and descriptions of equipment which can reach high temperatures creating hazardous and potentially dangerous situations. These pages should not be taken as a step by step guide on how to construct any items or carry out any particular procedure, nor should any references to safety contained herein be taken to guarantee safety in all situations.

Building the Quorn. The wheel head of the Quorn grinder. Last updated Jan The work head of the Quorn grinder.

Last updated May The toolholder of the Quorn grinder. Last updated Dec Electrical items used in the grinder. Last updated Mar Some accessories to go with the grinder.

A selection of work produced by the grinder. Last updated NovBuilding a Quorn seems to have become a kind of Holy Grail in the model engineering community — a necessary step en route to becoming a proper grown-up Model Engineer capitals intended ; a kind of Rite Of Passage or Membership Badge that many aspire to, but that all too few actually manage to pin on their lapels.

The Quorn is undoubtedly a very versatile machine, especially if all of the attachments, bells and whistles are built, rung, and blown respectively. And when you have finally finished building it, setting the thing up for use is, I am reliably informed by friends I know that have owned and used one in the past, a time consuming, fiddly, and therefore ultimately unrewarding process.

Of course, George and Arthur are both painfully aware that the Quorn conversation had to end there, otherwise they would have to admit to each other that in reality it will be a cold day in Hell before work on their Quorn has really started, let alone resulted in a usable machine.

Anyhow, I digress. It would also allow me to get rid of the Drill Doctor that has also been gathering dust on my bench, because while it is undoubtedly easy to use, my experience has been that it is, at the same time, impossibly difficult to use if your objective is to produce a decently sharp and symmetrical drill point. The kit duly arrived — a large and very heavy box full of pressed and punched steel components, various lengths of bar stock, a motor, and various other electrical components — and I struggled with it down the narrow stairs to the cellar.

First job — unpack it all and read the instructions. Photo 1 shows the components unpacked on the bench:. All seemed very straightforward; however, the instructions provided are clearly deficient in what is by far the most important aspect of building any new machine tool — how are you going to paint it, and in what colour?

Should it be Myford not-quite-battleship grey, or Myford not-quite-British Racing Green, or Myford — err…what do you call their latest colour…? Mediterranean-on-a-bad-day Turquoise? Hammerite hammered finish or Hammerite smooth? Leaded paint or unleaded? I wander into the larger of these wonderful DIY emporia.

He rummaged under the counter.

quorn tool and cutter grinder plans

Pushing my luck here, but I hold my ground. Definitely no eye contact now. He hands me the change and wanders out the back to bite the head off a whippet, while I exit the shop with my cans of Hammerite red-and-loike-it.

quorn tool and cutter grinder plans

Now I did, just for a brief moment, consider having the parts chrome plated instead of painting them, but I concluded that that would have been a tad over the top, not to say expensive; however, you may know different!

Figure 1 shows the overall layout of the machine, Figure 2 the work-slide, and Figure 3 the wheel mounting hub, with tables showing the materials used for the various components. In the remainder of the article, numbers in brackets refer to the component numbering scheme used on these figures.

quorn tool and cutter grinder plans

The first job, after deciding on the colour scheme of course, is to de-burr the sheet metal parts 1, 2, 3, and 6. Photo 2 gives you an idea of what you will have to deal with here; the punch and fold machine cuts out the arcs by nibbling away at them with a large number of small radiused cuts, so the result is a scalloped edge that needs a fair bit of elbow grease to get smooth.

The finishing would be so much easier. The next job was to number-punch the table to give degree markings. The instructions suggest a 4mm punch set; the set I had to hand was only 2mm, so I decided to make do, although I have to admit the resultant numbers would benefit from an increase in size.

A simple radial arm made from a scrap of wood with a small round-head screw in one end Photo 4 is helpful as a means of ensuring that the numbers are properly placed; the screw head locates in the centre hole on the table, and the arm length is chosen so that when a punch is held against its square end it is in the right position for punching the number.

You could of course make the deluxe version of this jig, with a slot in the end to make sure the punch is vertical in both axes, but the version shown worked for me. The instructions suggest leaving off the 90 degree marks as the table is difficult to support at the extreme ends because of the rubbing strip that is mounted underneath; however, in practice I found that punching the 90 degree marks was not a problem either.

Memo to Kirk: A laser etched scale would be a great improvement on the current design — it would be a trivial addition to have the numbers laser etched as well as the degree marks, which would give a much neater finish than using hand punches.

This is mostly pre-fabricated for you; it consists of a flat plate with a U-section plate spot welded on top to form a flat rectangular box with two open ends 1one at the motor end and one at the operator end of the finished machine. Suffice it to say that my collection of M6 taps is now one fewer than it was when I started, and one of the M6 bolts provided is now surplus to requirements….

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The base unit has 3 M6 captive nuts that have been inserted by the punch-and-fold machine. I found that all three had been slightly squashed in the manufacturing process, so they needed a quick run through with a M6 tap to clean up the threads before they would accept an M6 screw. You can, of course, leave the machine unpainted; however, I feel that a paint finish is desirable to protect from rust and also to improve the appearance of the finished machine.

Before painting, it is worth heeding the instructions on the can that suggest all smooth surfaces should be abraded; the paint seems to need a key to adhere well, and will flake off easily otherwise.

You will probably find that getting good coverage on all of the surfaces that need painting the top surface of the work table should be left unpainted will take most of 2 spray cans of Hammerite Smooth or 3 cans in my case, as one of them ran out of propellant after only a few squirts of paint.

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Once painted, these parts can be happily left to one side to give the paint a chance to set really hard, which takes a considerable time with Hammerite.Chaddock and available only as a kit of parts for completion at home. Today, with even well-used Deckels and Chinese-built replicas still commanding high prices, the Quorn remains an attractive proposition - though a challenging exercise to complete, even for the skilled.

Originally devised to sharpen the milling cutters necessary when building the Dore Westbury milling machine of which Prof. Chaddock was an owner the grinder can without modification also tackle lathe, shaper and planer tools, taps, reamers and twist and centre drills. With some adaptations it can also be used to modify or create special cutters - for example, those necessary when thread milling and cam forming in hard materials.

Although at first sight a complex piece of apparatus it is, essentially, very simple to use and even a beginner can produce first-class results after only perfunctory practice. The secret of its success is the ability to mount a range of different wheels - while being able to present the work to them in an almost unlimited number of ways. The cutter, once mounted in a suitable collet, or held in a clamp, can be slid lengthwise under the control of a micrometer-equipped screw whilst also being rotated oscillated or indexed tilted and rocked in multiple planes.

Degree engravings, protractor scales, setting pins, micrometer and limit stops are fitted where required and added greatly to the simplicity and ease of use.

Not only is the Quorn an amazingly useful tool, but building it an absorbing pastime, allowing the creator to produce either a utilitarian working example or one finished to the very highest cosmetic standards. Two versions of the Quorn were made, the Mk. The Mk. In Prof. Chaddock modified the design of the rotating base to eliminate the steel casting and replaced it with a fabricated component.

The revised kits contained all the necessary parts, as before, together with the materials necessary to construct the new base and two additional steel blanks, one for the backplate and another for the division dial.

The Quorn uses nine springs in its construction: one anti-backlash; one thimble; one index and six bearing pre-load - these originally being offered as one set, finished and ready to use.

Do check with the grinding wheel maker what the correct speed is and, if in doubt, scrap those provided and buy new ones there is also the danger that, unknown to you, the wheels might have been dropped or otherwise damaged and could burst in use. Some of the units shown below have no wheel guard; if yours is the same, the writer would strongly advise making one.

The best drive belt to use is a genuine Swiss-made Polycord in the right grade of material - these can be found here A number of home-built grinders inspired by the Quorn have been built, including the very fine example shown here - if you can't afford the Quorn kit--why not build your own.Privacy Terms.

The Home Machinist! A site dedicated to enthusiasts of all skill levels and disciplines of the metalworking hobby. Skip to content. Quick links. Stent Grinder Plans? Sadly, however, the garage is not as roomy as it used to be. Although it seems easy to find good deals on full-sized used machines, I don't think it would be sane to buy one. I've seen neat smaller grinders Sanfordbut they bring twice as much as the big ones. Which brings me to my issue. I saw a neat project called a Brooks Stent grinder.

Supposedly, this thing is capable of doing small bits of surface grinding. Naturally, I'm curious. But I can't find drawings or plans anywhere on the web. Does anyone know how to go about finding them? Re: Stent Grinder Plans? Last edited by ken on Sun Jan 20, am, edited 1 time in total. One must remember. The best learning experiences come from working with the older Masters.

But that site doesn't actually have plans. I don't even know where they were first published. You can download both issues in PDF or Kindle form.

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The inventor is Derek Brooks. I don't know where the "Stent" comes from, but it's also called a Brooks-Stent grinder.

I'm sure someone will explain. I saved them as a txt file which this forum will not let me upload. They pushed it in through the big artery in my leg. If you do it like this you will be error free. I was putting that stuff up so other people could find it in the future. I downloaded the issues before I posted that.


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