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17th September 2020, 10:17 PM #31
Matt
It may well seem that there is some particular, insidious intention behind the imperial thing, but it is as simple as brass is sold in imperial sizes so the rod is 1/2".
I chose BSW as the thread is coarse and I did not want to spend most of the day screwing. Uhmmm, I mean turning the cap screw.
Regards
PaulBushmiller;
"Power tends to corrupt. Absolute power corrupts, absolutely!"
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24th September 2020, 11:47 AM #32
I think in the early stages of this challenge we commented that it is best to build the plane around the blade. I had a long 50mm wide blade that I had intended for the low angle plane and a wider 60mm blade intended for the high angle plane. however, and without giving too much away ( read that as committing myself) I needed the low angle plane to have a 60mm blade. This required a major rethink and it became glaringly obvious that I would have to obtain or make a suitable blade.
One of my criteria was that the plane should be low cost making the most use of available materials as well as using tools that were commonly available to anyone. I checked my stash of dismantled leaf springs and they were all only 50mm wide. So I delved into the emergency supply, which was a set off a land cruiser that was given to me for this exact purpose by a friend several years ago.
The longer leaves are a little over 7mm thick and the thicker leaves a bit better than 11mm thick.
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With the drop saw I cut the ends off the leaves as they had already a shape that i thought would suit the plane blades. This is what remained of the three leaves. The blades are shown further down the page.
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In the depths of winter I would use the slow combustion heater as my improvised furnace to anneal the steel, but up here Spring has already firmly established itself ( 27 to 28 degree days) and the heat in the house would be intolerable. Consequently, as we had a couple of friends staying with us, I fired up the chimenea for a BBQ and stoked up the fire to cook the six blades I had cut. I intend to use three blades in the low angle plane (not all at the same time ) to provide alternate sharpening angles. The low angle planes normally require an adjustable mouth, which I consider is a little beyond my skill and facility levels, but I think the use of different thickness blades will partially get around this issue coupled with another little closely guarded secret which will be revealed at a later date. So two thick blades will be sharpened with different secondary bevels, which effectively provide different blade angles and the third blade will be thinner and developed to be able to produce thick rough shavings with increased clearance at the mouth. Of course if this all goes pear shaped all three blades may give a rough shaving!
It was a little difficult to see if the blades were heating to the required colour. I fully expected the chimenea to glow red, but surprisingly this didn't happen.
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When removed from the fire for a quick check they were red (but not the pink they appear in these pix). One is the thick blade and the other one of the thinner blades, but don't ask me which is which from the pix. In other words they were heat soaked:
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I continued cooking jacket potatoes, and then took off the top half of the chimenea to grill some meat. The blades were moved to the inside edge of the chimenea during the food cooking and were left in the fire overnight to cool slowly. This is them in the morning looking a bit like me (fairly rugged and ratty)
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and just cleaned up with a wire brush. They will need to be flattened either with a hammer or a hydraulic press and then cleaned up further to at least achieve a flat surface on the underside of the bevel. Blade length is 200mm
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These are the two blades to be used in conjunction with the high angle plane. A leaf spring on the left and the HSS, from a Group Buy many moons ago, on the right. I hope to be able to evaluate performance between the two. The leaf springs will all have to be cut down to 60mm wide as they are currently 70mm. Blade length is just over 100mm.
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Regards
PaulBushmiller;
"Power tends to corrupt. Absolute power corrupts, absolutely!"
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24th September 2020, 02:23 PM #33
Paul,
Very exciting to see some fabulous progress, one question still remains tho,
How were the Jacket potatoes, did they have all the trimmings or just there beautiful self with a smidgen of Butter?.
Cheers Matt.
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24th September 2020, 02:36 PM #34GOLD MEMBER
- Join Date
- Oct 2018
- Location
- Dandenong Ranges
- Posts
- 1,845
Hi Paul. I think I can see why you like leaf springs . Do you have to flatten them? Or are the sections short enough to be flat enough?
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24th September 2020, 02:48 PM #35
There were three sweet potatoes and one ordinary potato for me. I thought that was because I did not require any more sweetening, but it turns out the others felt it would be wasted on me as I was past redemption.
They were all served split open (the potatoes not the guests: this was not a sequel to Silence of the Lambs) and doused with lashings of sour cream. The meat came up exactly as ordered: Two rare and two medium rare so it appears I have redeemed myself from whatever long forgotten misdemeanor that had afflicted my standing in this small community.
None of this helped the plane blades but the process attracted a certain amount of curiosity by our guests coupled with concern it would have a disastrous effect on the food.
Regards
PaulBushmiller;
"Power tends to corrupt. Absolute power corrupts, absolutely!"
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24th September 2020, 06:25 PM #36
MA
The leaf springs are readily available. Even if friends do not gift them to you, I think you could call in at almost any car wreckers and get them for scrap metal prices, although I have never had to do this. Arguably they may not hold an edge as long as more modern O1/A1/PM-V11 product, but they will have a good edge for a time and don't cost $70+. A very real alternative, albeit with some compromise.
The springs do have to be flattened and this is the primary reason they must be annealed. In the hardened spring state your hammer will land on the moon before the steel flattens. Up to about 7mm the hammer works well, but much thicker than that and a press seems to be the go. My 20T press is down in NSW and inaccessible, but fortunately I have access to the press in the workshop at my workplace. I think that is within the challenge constraints as we are able to purchase a ready made blade.
The thinner blades have quite a bit of curvature. The thick blades have very little as they were part of the secondary spring section for heavier loads, but they are still not quite flat.
Regards
PaulBushmiller;
"Power tends to corrupt. Absolute power corrupts, absolutely!"
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24th September 2020, 07:33 PM #37
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24th September 2020, 08:36 PM #38
Matt
I have not quite reached that level of cremation, but recently on the same chimenea a friend came over for another BBQ and brought his own firewood too. Wonderful I thought. It was dead rosemary (no, no, the herb) and he thought it would impart a distinct flavour to the meat. Turns out that it burns with a similar intensity to charcoal and coking coal so the meat was extremely well done before I "twigged" (yeah, I know that's not one of my better efforts). Amazingly the meat was still edible, which was down to meat quality and a certain amount of luck, but it certainly was not medium rare.
Regards
PaulBushmiller;
"Power tends to corrupt. Absolute power corrupts, absolutely!"
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24th September 2020, 08:46 PM #39
I have reluctantly decided not to utilise any of the previously displayed drawings seeing as how some bloke on the other side of the world has allegedly plagiarised them. Instead I offer for your consideration some sketches which may or may not be used: may or may not be representative of a low angle fore plane and may or may not have even been drawn up by me.
P1060539 (Medium).JPGP1060540 (Medium).JPG
Regards
PaulBushmiller;
"Power tends to corrupt. Absolute power corrupts, absolutely!"
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24th September 2020, 09:04 PM #40
32 / 39
Too our honoured Judges,
Post 32 from Mr Bushmillar, clearly states he will not be doing an adjustable mouth on his Plane Build.
Yet now at Post 39 we have clear evidence of an adjustable mouth in both well detail plans.
Clearly Paul is trying to mis lead us all, in to thinking he is not capable, yet his plans clearly show he his capable of a open or closed mouth design.
I full insist we have clarity on this matter please.
Cheers Matt.
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25th September 2020, 12:15 AM #41
I object your honours. I don't agree that the drawings are that clear. I think they are most imprecise and possibly mis-leading: Maybe even deliberately so, but even that is unclear. There is a huge element of doubt surrounding a venture that has not evolved as yet.
Regards
PaulBushmiller;
"Power tends to corrupt. Absolute power corrupts, absolutely!"
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25th September 2020, 06:19 AM #42Member
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- Dec 2008
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- Rhode Island
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- 77
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25th September 2020, 07:10 AM #43
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25th September 2020, 08:51 AM #44SENIOR MEMBER
- Join Date
- Dec 2013
- Location
- Mt Waverley Vic 3149
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- 81
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- 354
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25th September 2020, 07:50 PM #45