By continuing to use this site, you agree to our use of cookies. Find out more

Member postings for oldvelo

Here is a list of all the postings oldvelo has made in our forums. Click on a thread name to jump to the thread.

Thread: The demise of UK fossil fuel Power Stations
19/01/2021 09:45:53

Read this article on BBC News a few months ago and found it hard to understand the reason for it.

Fossil Fuels

Can someone explain How 7,000,000 tonnes of wood pellets get to Drax power station and not using fossil fuels. The trees cut down in America and to be pelletised no doubt they used products from the Oil Industry which suprise suprise is a Fossil Fuel. The transport accross America then the Atlantic. Put on rail to Sheffield all Fossil Free?? All paid for by the consumers. All done with No damage to the environment where the trees are harvested from complete with a regeneration program in place maybe???

Eric

Thread: I wonder what the Aviation Authority thinks of this :
17/01/2021 16:19:18

Old Iron """Karen""" finds your comment Offensive

Thread: Taper-Lock Bushes - tolerances
29/12/2020 17:18:41

Hi Simon

One method used when assembling 'Taper Lock Bushes' is insert a 'Fox Wedge' or a flat blade screwdriver in the slot of the bush to open up the diameter slightly.

Then fit it into the pulley-flywheel with the retaining screws done up finger tight only to keep it secured the it will slide easily on the lightly greased shaft. NO grease on the tapers or retaining screws.

Eric

Thread: Velocette MAC
29/12/2020 00:12:28

Hi Robert please sit down first

Always alifelong intrest in Velocette I googled for KSS the bike in the photo

1937 KSS 1934 KSS

First 'Road Legal' bike I owned was a 1933 KSS

anoldvelo Eric

 

 

 

Edited By oldvelo on 29/12/2020 00:14:26

28/12/2020 20:13:48

Hi A Velocette fan from way back I spotted this hybrid one parked. The owner had fitted an overbored to 499cc KSS motor into a MSS frame.

kss-mss.jpg

Thread: Calor gas butane workshop radiant heater
23/12/2020 18:34:52

Sam

Running a gas flame heater in a small workshop producing carbon monoxide is not good for your health or for that matter your survival.

New Zealand Ministry Of Health Bulletin Gas Heater Warning

Stay Safe Take Care Kia Kaha

Eric

Thread: Message from ARC to our customers in the E.U.
10/12/2020 19:03:23

It was not broke I did not need to fix it. Now I wanted to break it so now we all need to work to fix it.

Thread: Whitworth v UNC
18/11/2020 00:00:35

Good luck trying to put 1/2 inch U.N.C. nut on whitworth and vice versa

Thread: Rubber mat.
03/11/2020 03:52:16

Concrete floor covered with sponge rubber matting with 12 mm painted chip board on top has a slight spring when walking on it. quick clean up with a brush any spills mop up off the painted surface.

Eric

Thread: Gib Screw Locking Methods
02/11/2020 06:39:25

I guess the point I made was not explained properly that I use good old fashioned "L" shape Allen Keys to adjust gibs and the Ring end of a ring open end spanner on the lock nut. No excess torsion spring forces required.

01/11/2020 21:23:12

Simple solution to the play of an allen key in a socket head screw is to exert pressure toward the screw at a right angle to the rotatation then do up the lock nut.

01/11/2020 05:59:56

Cup point set screws with a ball bearing <o> . Tighten all Grub screws remove one dress up the dimple in the jib with an egg beater hand drilll. Repeat on all screws then dismantle and clean up. Reassemble with the ball bearing in first sitting on the jib. Adjust to suit.

 

Edited By oldvelo on 01/11/2020 06:00:37

Edited By oldvelo on 01/11/2020 06:01:50

Thread: Which ball turner?
29/10/2020 19:52:45

Hi Clive

I can now see how a smaller lathe with a boring head fo a ball turner is a bit of shoe horn job.

A round piece of tool steel does a good job and cuts left and right

Ball Turner Boring Bar

This is the MEW Boring Bar set up as a Ball Turner. Has turned out a lot of stainless knobs to replace plastic ones.

Eric

29/10/2020 09:32:46

Hi Jim

Boring Bar head on a bushed shaft mounted horizontaly on the toolpost with a round nose high speed tool steel with the cutting edge on the vertical centre line will work fine and will cut on the right or left swing.

Use the tool upside down with the flat side facing downwards.

A 400 mm lever on the piviot shaft will give good control and finish with minimum effort.

Eric

Thread: Putting some grip (stippling) on an aluminium drive pulley.
17/10/2020 08:32:26

Poly Vee Belt 2 Ribs "j" 4.64 mm wide will do the job.

Pulleys in aluminium are easy to fabricate with a high speed steel tool ground to 40 degrees.

Eric

Thread: Moore & Wright Automatic Centre Punch
16/10/2020 01:23:29

Hi

If you overtighten the adjustment the punch will not cock it properly and will not work.

Eric

Thread: Axminster SX2
12/10/2020 04:59:51

Disconnect the leads from the motor and connect a 230 volt Light bulb to the control box motor leads.

Turn the speed control to the lowest speed then power up the control and turn up the speed control the light should get brighter. The control is O.K. if the light gets bright.

A 12 volt car battery will test the motor to run it allbeit slowly. If their is a short circuit in the motor the leads will get very hot super quick. Best done outside and away from flamables.

Eric

Thread: Grumpy old men
11/10/2020 18:15:14

When someone posts a question on MEW and I answer with how something actualy works and go into some details to explain it.

Then they repost my explanation in full then tell me it does not work like that at all. That they have a Theory of the way that they Assume it works is correct and is the only way to solve the problem.

The ones who drift off to post on something that maybe remote and possibly connected the subject being discussed on the forum

Thread: SX2P Gas Strut Modification Issue?
05/10/2020 18:39:05

Hi

Lets put all contradicting assumptions to one side they are the basis for misunderstanding and cause for many major disasters.

The plan in mind is to deal in facts only and avert such happenings.

The 5 mm 10 mm backlash that you demonstrate in the video is explained in my posting 1) to 5) Which is easily moved by light finger pressure this also allows a cutter that has not had the excessive lead backed off to drag the head down when machining Cast Iron, Bronze, or Brass.

The Worm Wheel does actually turn slightly as the clearances are taken up in this order 1) 5) 4) 3) 2) with a single start worm it is normaly self sustaining.

Perhaps the answer "using gravity to advantge" would be to add a 5kg-8kg weight to the cutting head to take out all the backlash when the head is being lowered and remove the weight when you need to raise the head.

Eric

05/10/2020 02:50:29

Hi

"As it stands, it’s just wrong to have the head forced up by default. It must be detrimental to accurate work - if you have a hand feed lever, you intuitively assume it’s limiting the tool position downwards. Currently, it’s basically moving the tool to its highest limit - all bets are off in terms of where it could end up in the workpiece".

"intuitively assume" are not terms consistent with precission engineering. To hold the head from being pulled into the job and elliminate the effect of the backlash is with a higher spring pressure to have the head held firmly UP at all times.

1 ) Backlash in an X2 is the clearance in the Rack and Pinion

2 ) The clearance in the Worm and Worm Wheel

3 ) End float on the worm to housing

4 ) Clearance on the Teeth on the Dog Clutch

5 ) Clearance on the Key and Keyway on the Pinion Shaft in The Dog Clutch

6 ) Two Universal Joints on the Worm Shaft Drive

All adds up to an excessive ammount of backlash. Around 3/4 of a full turn on my reasonably adjusted machine.

Eric

Magazine Locator

Want the latest issue of Model Engineer or Model Engineers' Workshop? Use our magazine locator links to find your nearest stockist!

Find Model Engineer & Model Engineers' Workshop

Latest Forum Posts
Support Our Partners
walker midge
Dreweatts
Eccentric July 5 2018
cowells
JD Metals
Warco
emcomachinetools
rapid Direct
Eccentric Engineering
Subscription Offer

Latest "For Sale" Ads
Latest "Wanted" Ads
Get In Touch!

Do you want to contact the Model Engineer and Model Engineers' Workshop team?

You can contact us by phone, mail or email about the magazines including becoming a contributor, submitting reader's letters or making queries about articles. You can also get in touch about this website, advertising or other general issues.

Click THIS LINK for full contact details.

For subscription issues please see THIS LINK.

Digital Back Issues

Social Media online

'Like' us on Facebook
Follow us on Facebook

Follow us on Twitter
 Twitter Logo

Pin us on Pinterest