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12th October 2020, 08:42 AM #106
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12th October 2020, 03:57 PM #107
MA
I have been using the fibre discs on my bench grinder for quite a time now. You asked how fine a finish it gives:
This is less than ten seconds on each of the saw screws. I have left the outside screws untouched to give a comparison.
P1060581 (Medium).JPG
Apologies. I have not photographed them well. The difference in the flesh is much more dramatic than in the pix.
The fibre discs work particularly well on brass, but a greater shine can then be achieved subsequently with conventional polishing if required. These wheels get rid of the bulk of the gunk.
It works well on most metals. These are some stainless steel off-cuts from the metal I will be using for the lever cap. It is recycled from I don't know what. I only cleaned half of each item again for comparison:
P1060583 (Medium).JPGP1060587 (Medium).JPG
So to the fibre wheels themselves. They, like all grinding/polishing wheels, do wear away. This is an 8" grinder but the left hand wheel is now about 6" and the right wheel....It's well overdue for replacement. Just getting my monies worth It is all down to he amount of use they are put to, but these have been in place for about two years I think.
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The bench grinder works well for smaller objects, but can be a little awkward for larger items, particularly as the disc wears away and the body of the grinder gets in the way. So quite recently I purchased these discs for use on a 4" angle grinder. The original project was for cleaning up the lightly rusted column on a radial arm saw. There was no way it was going to the bench grinder. I can barely lift one end!
I have used it to clean up the sides of the channel on the plane body and the stainless steel for the lever cap.
P1060580 (Medium).JPGP1060579 (Medium).JPG
There are different grits available. The higher numbers are harder and more dense and produce a better finish. So 9P is harder than 7P. (I think I have got that the right way around).
Regards
PaulBushmiller;
"Power tends to corrupt. Absolute power corrupts, absolutely!"
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12th October 2020, 11:36 PM #108
Favour BushMiller, could you post their brand and a link if you acquired them online?
Those are quite chunky compared to the rather flat ones Ive found so far (plus they use a stiff backing plastic). Yours seem luscious and thick!
edit - a-ha! One must spell fibre - FIBER - ....
https://www.aliexpress.com/item/32809476558.html
5P/7P/9P NonWoven Nylon Fiber Polishing Buffing Wheel Grinding Discs Metal | eBay
fiber discs 7p 9p - Google Search
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13th October 2020, 12:13 AM #109
WP
You are quite right "Fiber." (So how is a person who does not tell the truth spelt? "Fibber?" )
4" angle grinder version. No brand.
4'' Nylon Fiber Wheel 100mm Abrasive Polishing Buffing Disc Pad Angle Grinder 7P | eBay
This is typical for the bench grinder versons. It covers several diameters and grits.
4~12 Inch Nylon Fiber Polishing Wheel Buffing Pad for Polisher 5/7/9P 5/8" Hole | eBay
Regards
PaulBushmiller;
"Power tends to corrupt. Absolute power corrupts, absolutely!"
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13th October 2020, 07:58 AM #110GOLD MEMBER
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- Oct 2018
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- Dandenong Ranges
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Thanks Paul. They look like a great idea. I have been using a wire wheel to some effect but it's pretty coarse
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13th October 2020, 09:20 AM #111
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13th October 2020, 12:07 PM #112GOLD MEMBER
- Join Date
- Oct 2018
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- Dandenong Ranges
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And thanks WP.
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13th October 2020, 01:15 PM #113
Matt
I wish that it were true, but I'm afraid that it does not make W & D redundant. It does perform a lot of work that would be done with the coarser grades of W & D, but it does not surpass the finer grades. Neither will it give a totally flat surface, particularly if you keep using the grinder. Think of it as a refined or smooth flap disc and you have some understanding of the way it performs. However, they are not too expensive, bought from China.
Regards
PaulBushmiller;
"Power tends to corrupt. Absolute power corrupts, absolutely!"
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13th October 2020, 04:27 PM #114
Unfortunately that can translate to,be very careful with the course one’s,unless you like finding out later with the Wet and Dry using a flat block or surface plate of some description you have created shiny Hills and Valleys [emoji3064].
When is this free lunch arriving.
Cheers Matt.
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25th October 2020, 10:47 PM #115
I have been a bit preoccupied with other chores of late including going to work, which seems to becoming a larger chore than I ever remember. However, I thought I should update a bit so people don't think I have fallen off the perch.
Holy hell, I went looking for my thread and it was two pages back in the list! What have I been doing?
The answer is, of course, not much!
Just a little work on the blades. I have prepared two thick blades and four thin blades. I actually started to harden one of the blades and realised I had not drilled the holes for the adjuster. So I let it anneal again and took the opportunity to shape the bevel as well as drilling holes. These are without any cleaning
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It felt like it was taking days to shape the bevel. I did try some shortcuts and attempted to cut steel off with an angle grinder using a cutting disc. it worked well in terms of steel removal but I was not accurate enough and left a scar. One blade I had to re-cut which is why it is shorter than the others. Fortunately any damage is now cosmetic and will be removed with further shaping and sharpening. This is after a little work with the fibre disc only on the top side of the blade:
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The back of the blade is an issue. The four thinner blades I will or can just work at flattening with abrasive paper on a flat surface and I will end up with sufficient flat metal behind the cutting edge for my purpose, but the thick blades I did not select carefully enough and there is a crater behind both ( the two on the right in the pic below). I am hoping the surface grinder at work is going to be repaired soon as that is the only way I can achieve a flat surface there. Given an arm as strong as Matt's I might be able to use abrasive paper technology, but for me hell will freeze over, pigs will fly and I will depart the mortal coil before a flat surface shows itself!
P1060598 (Medium).JPG
So apart from lotsa thinking, not much more has been done on this front.
Regards
PaulBushmiller;
"Power tends to corrupt. Absolute power corrupts, absolutely!"
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31st October 2020, 09:32 PM #116SENIOR MEMBER
- Join Date
- Oct 2010
- Location
- NSW
- Posts
- 513
I'm watching this with interest Paul. I mentioned when I decided to join this motley crew that I had once collected some material to make a plane but didn't go on with it. It turns out that we had similar ideas and if you look at my build thread, and in particular any photos of my drill press vice, I'm sure you'll see where I ended up using the piece of 75mm channel that I had planned to use for the plane.
I'll be interested to see how it all works out. It's looking good so far.
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10th February 2021, 10:40 PM #117
I realised I had not done anything on my plane since before Xmas but that is not quite correct: It was well before Xmas!
As I have not really done any serious drawings, there were some frivolous pictures early on in the piece, I decided to cut up some rough radiata pine and put some lumps of timber in place just to see how things might fit. This was after the lower edges were routered with a rounding over bit. I thought it was a perfect fit with a single pass until I reviewed the pix: A little bit more has to come off, but that should not be too hard to do even with the final hard timber. I have noticed that camera can often pick up defects that the human eye glosses over!
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The back section bandsawn to get an idea:
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The bed sawn at 20° for a bevel up.
P1070068 (Medium).JPG
Quite a bit of jostling to go yet to see where to cut the mouth and one thing it will do is cut the blind mortice for the handle before I shape the rear infill. It will be much easier.
Regards
PaulBushmiller;
"Power tends to corrupt. Absolute power corrupts, absolutely!"
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11th February 2021, 02:53 AM #118
Good to see some progress. That's going to be a brute - so I Dub thee, "The Brute". How's that?
Steve
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11th February 2021, 07:53 AM #119
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11th February 2021, 08:53 AM #120
Paul, if I were prototyping the brute (which to be fair has the potential to be a rather handsome fellow when scrubbed up - a John Wayne of planes maybe?!), I would need to spend some time deciding just where to put the handle/tote. With this low-angle design (I'm presuming you won't be fitting a screw adjuster), you will need enough room to tap the end of the blade for setting, but you will want the handle far enough forward to give it a good "action". It's really hard to know where the best position will be just by eyeballing the plane. I'd saw or router a shallow slot in the rear rough infill and knock up a handle with a couple of screw-holes in the projecting 'toe' so I could screw it down at various points and test-fit the blade, or a mock-up of the blade. You'll get some idea from hefting it & making mock passes over a bit of wood how much room you can allow without getting the handle too far to the rear & making it awkward to push.
I hadn't realised you were doing a low-angle BU job - you probably mentioned it earlier & I've missed or forgotten it & already said how you intend cutting the mouth & blade-bed. You really do like a challenge, don't you! Cutting a low-angle mouth in a solid sole with hand tools isn't impossible, but I reckon it would be exceedingly difficult. I've not attempted it, so can't speak from experience, but I do know you can't get even the thinnest of files through flat on the the bed for a 15 degree bed angle unless you open the mouth way beyond reasonable. They often tout it as a great virtue, but methinks the reason manufacturers put adjustable toe-pieces on their low-angle jobs with cast bodies has more to do with this problem than giving users something extra to play with.
I saw a thread on a UK forum where a bloke did a low-angle mouth in a solid sole with a milling machine without too much bother. Do you have a decent mill at your workplace with an operator who is susceptible to small inducements like a slab of beer? Given that the organisers have re-defined slightly more relaxed "rules" about external help ( ), I'm sure the judges wouldn't treat you too harshly for calling in the heavy artillery at such a crucial stage of the battle - I wouldn't knock more than 50% off your point score, anyway......
Cheers,IW