Broach file

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We strive to create strategic and valuable partnerships with all of our high-volume customers across a variety of markets. We are the best at what we do. It is just a matter of setup and the same thought process as required in model Engineering design and construction. You are correct in that the highest quality tools will provide the highest quality results.

This will be especially true for the purchase of your tweezers. Jerry Kieffer. Dave B Banned. Jun 7, 2, 9 0 Westminster. MD Country. It was close to a year before I got into anything that required broaches. Dave B - I am on my way to cutting my first wheel and I have made an arbor, collet and pinion.

I will soon be at the stage of staking it all onto the arbor so I can imagine some of these tools will be needed shortly. Hi Jerry, I totally appreciate what you are saying and if I may quote Colin Thorne from the book, this is what inspired me to ask the question: The only specialist tools you should get before you start are a couple of sets of clockmakers' broaches.

These are tapered five-sided cutting broaches, and are used for enlarging holes for fitting pivots in plates, also for forming drive fit holes for fitting wheels on their collets, etc.

Use them only for cutting brass. You will ned a selection of sizes, from about 0. Mike Phelan Registered User. Chris Jerry is spot-on about the ME events and using good tools; there are two at Harrogate every year and also a few more around the country.

Broaches are essential, and unique to clockmaking. There's no substitute, but they will last for years. Same with tweezers - cheap ones will soon end up in the bin. Hi Mike Thank you for the advice. Colin recommends a set from 0. Is such a set needed do you think or are there any sets which cover a larger range? Horology said:. I appreciate your reply. I would like to have Colin Thorne or anyone else Explain this. The reason for the tapered hole is twofold: 1. When assembling the clock, it is often necessary when fitting the second plate to have to locate the pivots one at a time, particularly in an older clock, because the pivots will be slightly floppy in their holes in the other plate, and therefore do not all stand up nice and straight.

The plates are obviously not parallel at this stage, and therefore the pivots are slightly out of the perpendicular to this plate until it is finally pushed down onto the ends of the pillars. The slight taper to the holes assist this assembly procedure, having said that it should be noted that when assembling on a level surface, it is quite possible, even lightly, that the second plate will sit right down over all the pivots and pillars with no "fiddling" at all.

One gets a great feeling of satisfaction of a job well done when that happens. We are back to the problem of reducing friction: with the hole tapered from both ends, the pivot is bearing on a very small area near the center of the hole. Wear will eventually increase this bearing area, but at least we start off with the ideal. Just an observation, but I think you are talking about two different holes. The hole that you fit a bushing in should be tapered for a more secure fit..

The hole that the pivot fits in, perhaps not. Jan 6, 71 0 6 Northern Virginia Country Region. I think Colin's point about a tapered hole being a better bearing surface is spot on, though. You want the least amount of contact possible between the bushing and the pivot for the least amount of resistance in the train.

The equation for friction is includes surface area, so the lower the surface area, the less friction. A straight hole would have more surface area contacting the pivot, so more power being robbed from the train. I have managed to move this thread quite off topic but to clarify, the writing was a word for word quote. Harold, I think we are talking about the same holes, those that the pivots fits in. Anyway, regarding my questions such as broach sets and tweezers.. Ninjak2k said:. Thanks, Jerry, for that explanation.

I definitely have much to learn. Is it possible to find gage pin sets that are already like that for reaming, or can precision drill bits or boring tools be found to accomplish the same thing?

Cheers, Dan. First Known Use of broach Noun 13th century, in the meaning defined at sense 1 Verb 1 15th century, in the meaning defined at transitive sense 1a Verb 2 , in the meaning defined above.

Learn More About broach. Time Traveler for broach The first known use of broach was in the 13th century See more words from the same century. From the Editors at Merriam-Webster. Statistics for broach Look-up Popularity. Style: MLA. English Language Learners Definition of broach. Kids Definition of broach. Medical Definition of broach Entry 1 of 2. Medical Definition of broach Entry 2 of 2. Get Word of the Day daily email!

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