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Member postings for Nick Wheeler

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

Thread: Threaded milling cutters
16/04/2021 20:20:23
Posted by Dave Halford on 16/04/2021 14:26:11:

You only need 4 sizes of collet

6mm 10mm 12mm 16mm

That's extremely limiting.

A full set of ER collets isn't expensive and means you can use any tool that is within your system's range. Not having to swap to the drill chuck every time you need to drill a couple of holes would justify the extra cost as an example.

It makes buying ER collet blocks an even more sensible purchase too.

I always buy the set when there is one, as experience has shown I will always need the 'you'll never use that size' at odd times and it's really frustrating and time-wasting to have only half the tool.

If cost was an issue, then I would happily forego some of the other must haves, as I have some and have never used them; my 123 blocks and machinists jacks just take up room in the toolbox.

Thread: Loctite or Draper? Much difference?
11/04/2021 23:44:00
Posted by Clive Foster on 11/04/2021 18:12:37:

In our world probably no practical difference.

At the higher end where specification details matter Loctite probably has the edge.

Have you checked Amazon prices. Draper and Loctite appear pretty similar in the UK.

That.

When we did the nose wheel modification on a Cessna Caravan, £20 on a new bottle of the specified Loctite was a trivial part of a £5000 job on a £1.5 million aeroplane. It also meant the paper trail was correct.

When I made an fitted a new headstock bolt for this clapper

repairedclapper.jpg

fitted to a 250kg bell, the gudgeon pin and bolt got a smear of the generic £3/bottle medium-strength stuff that I've had for years.

Thread: Distorted ship's hull steel panels
10/04/2021 20:09:05

Why would the external panels only be welded to each other, and not the internal structure that you can't see?

Thread: How do I remove this small bearing? And the one behind it.
09/04/2021 20:10:50
Posted by Nicholas Farr on 09/04/2021 12:55:03:

Hi pgrbff, you can get proper extractors for removing bearings in a blind hole, but are a bit expensive for an occasional job. Your local garage or an engineer firm may have such things.

These sets are available all over the place: LINK for well under £30

09/04/2021 10:38:05
Posted by pgrbff on 09/04/2021 10:15:50:
Posted by Nicholas Wheeler 1 on 09/04/2021 08:42:15:

Expanding mandrel(a rawlbolt) and slide hammer for the first; hammer and drift for the second.

Or you could buy a bearing puller that works the same way.

I'm not sure there is enough room between the stacked bearings.

What is the easiest destructive way to remove them?

Why would this method need space between the bearings? The expanding mandrel grips the inner race of the first bearing. It would work well with the spacer and threaded bar mentioned in other posts, which given the lack of support on the housing is probably a better idea.

I hadn't read your first post properly to realise they're in a blind hole, so would use the same technique on the lower bearing.

If the housing is aluminium, then I'd set up the puller and give the housing a lick of heat to make the job go better.

I've never had any luck extracting bearings with the grease method which just seems to make a mess.

09/04/2021 08:42:15

Expanding mandrel(a rawlbolt) and slide hammer for the first; hammer and drift for the second.

Or you could buy a bearing puller that works the same way.

Thread: Fusion 360 personal use
03/04/2021 10:47:30

The free subscription to Fusion now has a limit of 10 editable files at any time.

If you reach the limit of 10, then you have to make at least one of them read only to edit an earlier one. Do this from the data panel

This is mildly annoying, but is only really going to cause problems if you insist on having each component as a separate file.

Thread: CNC - What's the Problem?
01/04/2021 10:25:25
Posted by Ady1 on 01/04/2021 06:53:25:

It's a bit like with cars

When cheaper self driving CNC versions become available will we all race off to buy one?

How much fun is it to push a button?

It's not about the destination, it's about the journey

bla bla

Standing in front of a machine cranking handles to scrape material off a block isn't fun. It's work. Tedious and time consuming work.

Brushing the removed material away from the part and removing it from the machine so it can be put to the purpose it was made for is the fun bit.

Spending time in the workshop isn't my hobby. I do it because the real hobbies require making/modifying/fabricating stuff.

I'd like to reduce the amount of time I spend doing this, and the best way would be to buy a Bridgeport sized mill. But I don't have enough space for the benchtop machines, so automating my X2 mill to do the boring work while I do something else is sensible. That something else could be assembling parts, designing the next ones, or making a coffee and learning the leads of Cambridge Minor.

Edited By Nicholas Wheeler 1 on 01/04/2021 10:38:04

Thread: Cutting a V-Groove in Aluminium
28/03/2021 17:15:52

You could do that quickly with a coarse file.

Thread: 1960's Car Steering Wheel Taper Angle
26/03/2021 20:07:06
Posted by Maurice Taylor on 26/03/2021 19:39:20:

Hi, According to Motalita website taper is 8 degrees and 9.96mm long.

Maurice

Yes, I found that, but ringing practice took precedence over posting here

Thread: Barrier Creams
26/03/2021 08:31:19

Dermashield

one small application will last for several hours, so even the small aerosol will last for ages.

Thread: Milling Vice clamps
25/03/2021 18:39:03
Posted by Dave Halford on 25/03/2021 17:49:25:
Posted by Nicholas Wheeler 1 on 24/03/2021 11:25:24:
Posted by Chris V on 24/03/2021 09:19:53:

I hadn't considered the heels of the clamp down buttons marking the table, apart from removing the sharpness
off the corners how do you suggest avoiding this?

The heels on mine are about 2mm wide and 1 deep. I never considered they might mark the table and after about 16 years, they haven't.

I don't understand the need for all the extra complexity involved with this set up and even if the table is made of cheese Johns vise and clamp combo should not need the plate. I would be worrying more about the table humping under the pressure of the tee nuts.

I agree, which is why my vice clamps fit into the holes in the vice pin holes, and clamps directly to the table.

Thread: Was Draw Filing ever a chargeable offence in the RAF?
24/03/2021 23:01:30

What would they have done instead?

Thread: That little elf under the workbench again
24/03/2021 18:21:19
Posted by mark costello 1 on 24/03/2021 17:18:08:

Just asking You blokes why have You sent some of those borrowers over here across the pond? We did not want to share THAT particular misery.wink

As an American, at least you shoot the little buggers.

Thread: Any advice on how to cut/file a 45 degree chamfer on a 1mm steel sheet to EXACTLY 45 degrees?
24/03/2021 18:17:52

Another thing to consider is that running abrasive grinding points along lengths of 1mm thick steel is going to wear grooves in them very quickly.

Thread: Is RSJ Steel machinable?
24/03/2021 13:24:40

It cuts, drills and files well.

Cutting up RSJs just to keep the steel is daft. It's much more likely to be of use in long lengths.

Thread: What's the general consensus please?
24/03/2021 12:18:04

If you frequently use all your drill's capacity, you'll find the mill a bit small

Thread: Tapers and where to start
24/03/2021 11:47:17
Posted by Hopper on 24/03/2021 11:26:03:I guess I was confused when you said: I suspect that is one of those ideas that isn't really necessary. The disc on a push bike will knock the pads back enough for the brakes not to bind, which you really notice.

Apologies if I was confused by what you said.

None takenthumbs up

my point was that even pedal bike brake discs knock the pads back. If the bloody things haven't seized - they're really fussy.

As we're talking about Brembo calipers, and motorcycle ones at that, I'd be worried about the rest of the caliper's durability before a slightly modified rattle spring pin....

Thread: Milling Vice clamps
24/03/2021 11:25:24
Posted by Chris V on 24/03/2021 09:19:53:

I hadn't considered the heels of the clamp down buttons marking the table, apart from removing the sharpness
off the corners how do you suggest avoiding this?

The heels on mine are about 2mm wide and 1 deep. I never considered they might mark the table and after about 16 years, they haven't.

I don't want studs and nuts for this sort of clamp as theyget in the way; mine use allen bolts in counterbores. It takes a few seconds to check their length the first time they're used, and shorten them if necessary

Thread: Tapers and where to start
24/03/2021 10:27:33

Posted by Hopper on 22/03/2021 21:38:57:

Not these calipers. The leaf type spring as seen in the pic is held by the pad retaining pins each end and the middle of the spring bears on the tapered pin which in turn transfers the spring pressure to the pads themselves. This stops the pads from rattling but does not make the pistons retract -- the piston seals plus any small runout on the disc do that.

Your suggestion earlier of reducing the ends of the pins to fit in the recesses in the pads is dangerous. As the pads wear they need to move inwards. A shoulder where the pin has been reduced instead of a taper would hold them apart and stop them bearing on the disc when brakes are applied.

Stick with Brembo's original design. They just might know more about their brakes calipers than we do.

Where did I even imply that the springs retract the pistons? The small runout of the disc knocks the pads back. I've never seen a caliper that wouldn't function perfectly as a brake with the anti-rattle springs, of whatever design, removed. Some calipers don't have them.

My suggestion was to not taper the parts but reduce the ends, with a larger diameter in the centre for the spring, like this ---+---. The shoulder would be nowhere near the pads, unless the disc wore right through. I have seen that, also solid discs fitted instead of vented, and in both instances sticking pads would have been an improvement.....

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