Here is a list of all the postings tractionengine42 has made in our forums. Click on a thread name to jump to the thread.
|Thread: The Workshop Progress thread 2018|
The needles cost less than £2 the set and all the other materials were just some off cuts so a very cheap and quick project, the practice takes longer than the building.
I missed a digit off the last link, here it is again.
I have a Stuart 10V i'd like to paint and do a bit of lining on. I've done some lining with an old fashioned draughtsman pen but wanted to try a lining pen. I found some 'blunt dispensing needles' and used them to make a lining pen. My initial trials have given some pretty good results though I need to learn more of the technique. I made some video's to share the idea if anyone should be interested.
Edited By tractionengine42 on 01/11/2018 20:44:57
|Thread: Oxy Acetylene or Oxy Propane?|
I use a rent free oxy bottle for my oxy propane set-up, in the long run I believe it will be more economical and would recommend giving this consideration. You pay a refundable deposit on the bottle, a oxy refill costs around £35 for a 9 litre bottle. My local auto spares supplies rent free welding gas and oxy. For hobby use you can expect one 9 or 10 litre oxy bottle to last a considerable length of time, after 1 year or so I've used 1/4 bottle. I mostly use my oxy propane for small fabrications and hot metal forming but have used it alongside a propane torch to silver solder a copper vertical boiler.
I did have an oxy propane set using disposable cylinders but found it too expensive to use regularly, this was some time ago though.
|Thread: HQS taps and dies - anyone tried them?|
HQS taps and dies are carbon steel, I couldn't testify as to the steel grade or quality but HQS taps that I have bought have looked ok and worked well on a range of materials. Cheaper carbon steel taps have in some cases been ok and other cases terrible.
IMO for a tap or die that isn't to be used often then buying HQS will be a better guarantee of a tap or die that will cut a good thread otherwise, buy cheaper carbon steel taps ahd dies from and reputable supplier who will replace a faulty product.
Edited By tractionengine42 on 22/07/2018 23:51:34
|Thread: Getting a brass plaque engraved|
Many cam software programs will import a pdf file, I've done a number of name plates this way using Vectric 2dCut cam software. Most home CNC machinists will be able to import a number of different formats. Personally I find pdf very convenient and with accurate results.
|Thread: WIN 10 again!|
Had the same problem 3 times on my Acer desktop after a win10 update. First 2 times got into repair mode, 3rd time I could do nothing and had to reinstall win10 from an ISO image then reinstall all my sofwares and files.
Mght he coinsidence but after changing the internet settings to "metered connection" there are significantly less updates and have had no more problems. I had come to hate win10 but since the last reinstall and making this setting change a year ago I'v been ok with it
My better half has hard similar experiences on a Toshiba laptop.
I find Britec on YouTube to be a good source of help for dealing with win10.
Edited By tractionengine42 on 08/04/2018 05:28:14
Edited By tractionengine42 on 08/04/2018 05:29:14
|Thread: Grinding carbide inserts|
I use a carbide insert parting tool. Initially I found it did not cut as well as expected and I didn't have much confidence using it . Recently, after very lightly grinding the front rake of the parting insert on a diamond wheel, I found it cut a great deal better and without any problems.
|Thread: CNC Anyone recommend small firms that do it?|
Ron & Martin
I've sent you a PM.
|Thread: lathe tool cutting oils|
Andrew, is your refractometer something like this one?
|Thread: What Did You Do Today (2017)|
What does the abbreviation ELS stand for?
Edited By tractionengine42 on 16/12/2017 10:54:58
Hi Graeme W
There is no mixing nozzle as such, the coolant simply drips into the air flow. The original block that came with the mist coolant effectively becomes a tee block, it's not necessary to start with a mist coolant.(I bought the mist coolant because it had the regulating valve at a very economical cost, but in the end that valve was ineffective).
All the tubing is all 4 mm o/d, the outlet nozzle is 4 mm o/d brass tube.
I have attached a rough schematic below. I considered a few much more elaborate arrangements, this very simple arrangement is working very much to my satisfaction, I wanted to have a very low coolant consumption, just enough to lubricate the cutter.
Hope this helps and good luck with your set up.
Edit - The coolant exits the brass tube nozzle in droplets with no misting.
Edited By tractionengine42 on 13/12/2017 10:55:21
Converted a cheap mist coolant system into a 'mist busting' pressurised system for my cnc mill.
I used a water supply filter casing as the pressurised coolant tank, so far it's works very well, the coolant flow can be adjusted from zero to a dribble (and faster). It was necessary to add an additional regulating valve in the coolant supply line, the regulating valve supplied with the standard mist coolant assembly didn't work very well.
The photo below shows the set up, the centre outlet from the tank supplies the coolant to the nozzle and the far right connection the air to the nozzle. It's not necessary to have a water trap on the inlet regulator, it's just what I had to hand. The top connection on the nozzle assembly is the coolant supply.
Hi Micheal W, cutting that vee shape was an opportunity to use my Elliott Omnimill using a vee shaped cutter in the horizontal spindle arbour. So that cutter that came with the mill has found at least one use.
Edited By tractionengine42 on 28/11/2017 22:49:03
|Thread: Looking for model engineers in Scotland, Aberdeen / Glasgow|
I've sent you a PM.
|Thread: What Did You Do Today (2017)|
Today I completed this tool which I believe is called a finger plate. No drawings just based upon what I can remember seeing from time to time.
I wanted a quick simple project with some nice milling and turning. This is a tool I have wanted for some time to help hold small parts for drilling and linishing etc. I think it should be useful.
A cross drilling feature is included with 2 aluminium bronze bushes to suit 2 sizes of spot drills I use, 3mm @ 5mm.
All materials from the scrap box and sizes determined by the size of the piece I used for the base block about 3" x 4". I think these tools are usually made much smaller.
|Thread: Need help zeroing an old style M&W No.961SB 0-1"micrometer|
Soaking it in penetrating/release oil a few hours may help.
|Thread: tnmg inserts|
Tools using inserts with a plain straight hole don't use screws for clamping, they have an internal and/or external clamp arrangement where a screw acts on a lever and the lever clamps the insert.
I would imagine the leading manufactures will have some information on their websites.
Edited By tractionengine42 on 18/09/2017 16:13:50
|Thread: Cutting a Cam|
I think the idea is that you take a number of incremental cuts. After taking the first cut the cam blank should be rotated a few degrees and a second cut taken, then repeated for a third cut, forth cut and so on untill the full cam profile is complete. This will leave the cam with a number of facets which will need to be blended using a file, emery paper and or stone.
Your first cam looks right for the first cut, it needs setting up in the fixture again and several more cuts rotating the cam on the fixture a few degrees each time.
|Thread: English dialect|
As a Northumbrian a part that is within a Midgy's nif naf is good enough most of the time.
|Thread: Repairing a cheap Ducato jack|
You can download an o ring guide here **LINK**
You can determine the pressure that the seal has to take by Jack max load / piston area.
The clearance between the piston and cylinder is termed the extrusion gap, this should be within specified limits for the seal to function reliably. If the extrusion gap is to big for the pressure applied the seal could extrude through the gap. My guess is your application is low pressure though.
A quality 70 shore hardness o ring will easily take more more than 1000 psi. Backup rings are used for higher pressures, these effectively increase resistance to seal extrusion.
I think using an o ring will provide a much safer and reliable jack. If the cylinder is steel then a bronze piston would be preferable. The finish on the cylinder bore needs to be a smooth finish with no scoring.
PS presumably you will need to put a seal between a metal piston and the piston rod.
Edited By tractionengine42 on 14/09/2017 07:24:07
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