From the Workshop

April 22, 2020

Improved pattern mitre

Filed under: Specials — Tags: , , , , — admin @ 6:51 pm

Holtey improved pattern mitre plane, Norris and Spiers style. But with an adjuster

Lever cap for improved pattern mitre plane

Leadwood A11 Dec 06 g

Improved pattern Mitre plane showing bun

Image15 (1)

improved pattern mitre plane with adjuster, rear view

Image21 (1)

showing adjuster in it’s recess

Image6 (1)

Image2 (1)

April 18, 2020

Dovetailing v peining v screwing v in situ doweling

Filed under: Commentary,Window to my workshop — Tags: , , — admin @ 6:10 pm

Lets start with dovetailing. The effectiveness of a dovetail must be compounded so that you show a dovetail form on two sides. That means you are going to have a void on one side which will need filling. You will need a bit of extra material left on the ends of the pins and dovetails. This means you have to move the metal around by peining to fill the voids. You have already picked up on my pinch formers and the clamping plates which are made to fit inside the dovetails. All that peining is going to push a lot of things around. Another problem is that there is going to be pressure along the line of dovetails which will then convex the sole. If it doesn’t then you are not peining it hard enough, you want to stuff as much material as possible into those voids. There are good and bad dovetails around. Once everything is all snug and finished there will be a lot of material to flush away and the bottom needs to be flattened on the mill. Also the sides need to be treated in a similar way. I don’t know how far other people go with their dovetailing but this is how I do it. You will notice how true each tail is. All lines are straight and sharp. The former is kept parallel and is the same width as the pinch sides of the bottom. In my language this is a F******g load of work.

IMG_0317

There are two other options. One of these is to form dowels in situ on the bottom which has to be a very accurate process to match with the corresponding holes on the sides. This process needs to be done on a CNC. All in all the work is probably equal to the dovetailing as the peining is a very boring process and has the same effect of causing a lot of pressure with the same problems as above. i.e. you are putting in a lot of stress.

Screwing – is probably a little more work as I am not going to buy a box of screws out of a DIY shop – they are purpose made by me. They have a counter sink angle of 40 deg unlike the 90 deg on a standard screw. Also the screw requires a plain shank as a positioning reference. The heads of the screws need to have a positive drive as they are going to be to a required torque. The angle of the countersink has to be tighter at the top than at the bottom. So as they tighten there will be some metal displacement so there will be no gaps or joints showing. Each screw is then thread locked. With this stage complete the heads can be cut off and the body is then milled true. There is more work in making each screw than one dovetail. But this process has a plus factor by not loading the chassis up with stress.

14 No 982 final torking up of fixing bolts

April 17, 2020

No 10 Smoother plane revisited

Filed under: No 10 smoother/mitre — Tags: , , , — admin @ 11:47 am

No 10 small smoother plane. Metal component parts

IMG_0445

peining the dovetails showing the forming tools

IMG_0317

Showing various infills

IMG_0677

The finished No 10 smoother plane

CI3A1002

No 10 smoothing plane revisited

No 10 small finishing plane. The relationship between the sneck piece and the blade.

OLYMPUS DIGITAL CAMERA

The blade is rejigged so that the milling cutter can follow the original contours of the facet.

OLYMPUS DIGITAL CAMERA

The sneck form is milled after the integral rivets have been peined with a fly press. The blade used at this stage has been hardened and surface ground. The hardening is the only item which is outsourced to a heat treatment specialist.

OLYMPUS DIGITAL CAMERA

The finished No 10 blade

OLYMPUS DIGITAL CAMERA

No 10 smoothing plane revisited

No 10 smoothing plane. I have chosen this plane for its simplicity as an insight for the amount of work and effort that goes into this plane. I will tell its story over the next few postings.

CI3A0996

Starting with the blade drilling and facet forming

OLYMPUS DIGITAL CAMERA

Integral rivets being milled in situ on a bar strip to be cut up into individual sneck pieces

– Version 2

Sneck pieces shown after being cut into individual pieces

OLYMPUS DIGITAL CAMERA

April 2, 2020

Workshop Blog No 33 – No 984

Some photos of the No 984 panel plane

CI3A6503

No 984 panel plane sides being routed on milling machine – no water jet or laser here. All work in house.

CI3A6537

No 984 panel plane milling of blade bed and adjuster recess.

CI3A3023

No 984 panel plane. Lever cap, adjuster and bun are easily removed without any tools

CI3A3030

No 984 panel plane with acrylic and rosewood ( honduran rosewood) handles

Powered by WordPress