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Member postings for Ian Parkin

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

Thread: pillar drill column
16/01/2013 12:03:01

I need a new length of steel for my startrite pillar drill column 1.5 metres long would be fine

it needs to be 2 3/4 " diameter

any suggestions on where to source such material and will it need grinding to size or will bright drawn be ok wall thickness is 4mm or thereabouts


Thread: Zeroing a mechanical digital micrometer
15/10/2012 10:44:27

Gordon may be refering to the other type of digital micrometer ???


I should imagine that there would be a method of removing the counter mechanism and reseting the gear chain



Edited By Ian Parkin on 15/10/2012 10:46:31

Thread: where to get screwdriver handle material
19/07/2012 17:29:06

Whilst at school we used to make a screwdriver as a project

we warmed up the screwdriver spindle and forced it into a predrilled hole in a plastic material that was translucent yellow and sometimes it was fluted

we had turned a nice dome on the end and a finger stop groove near the blade and polished it to a high polish

Where could I get some of this material from

was it cellulose acetate butyrate? CAB

seem to remember GPO screwdrivers were made of this too


Thread: How to cut tungsten carbide?
16/07/2012 14:55:23

Yes perhaps they are lesser grade of steel the steel i can cope with but will the tungsten snap where I want it to? its perhaps 10mm x 1.5 in size on a backing of steel 25mm x 3.5 mm the planer blades want to end up at 310mm long from their existing 400 mm long.

I'm presuming a thin cutting disc wont touch the carbide?

16/07/2012 08:00:51

I'm considering buying some tungten carbide tipped planer blades that are too long for my there any easy way to trim these down?

they are HSS with tips on 1"x 1/8" x 16" long

thinking my tile saw? diamond blade water cooled?

Thread: How much pressure is an arbour press capable of
12/06/2012 09:10:02

Many thanks for all your replies

as I said I have a small press which is claimed to be a 1 tonne press its small weighs perhaps 6 kg and has a bar perhaps 20cm long ebays full of them

I have a very large one perhaps 75kg weight with a 50cm bar I never used it as I have a large hydraulic one which i use more so I put it up for sale on ebay ( sub sold) It was just a query from a prospective buyer as to what "tonnage" it was ...which made me think what indeed it I can't imagine that the little one I have will ever provide a force of a tonne...looking at ebay ads for new chinese presses one like my big one suggests 5 tonnes for a press of this size

So how do manufacturers measure their tonnage?

10/06/2012 09:21:28

I,m selling a large arbour press and someone has asked "what tonnage is it " so how do I calculate the pressure ? I have small one bought from Axminster almost pocket sized and they claim it's a 1 tonne size...what does that mean? My big press the gear is 25 mm radius and bar is 500 long does that mean a 20 fold increase in force applied at the handle ?making say only 2000 kg if you could apply 100 kg force?

so how do the little presses claim 1 tonne

Thread: can anyone find online supplier of this bearing
22/05/2012 08:09:37

Thanks for all your replies

I know that a 63000 is close but I was more intrigued as to why startrite had used such an unusual bearing

also these seem to be very expensive £6 for a budget and £12 for a brand name


21/05/2012 19:51:11

I have a startrite bandsaw most bearings are imperial sizes

however the blade guide bearings are as follows

marked nachi 10bcs 1nsl

id 10mm (measured on the shaft it fits on)

od 26.1mm ( measured on bearing)

width 11.5 mm

any ideas as to a supplier?


Thread: How much ???
18/10/2011 12:06:36
Do you have a friend in the uk that can buy the bits for you and send them on?
I would be happy to oblige
Or can I not post anything on to you because of rules?
Thread: whats this tool called?
06/10/2011 12:33:05
Not found the thing I had in mind but these will do

Elastrator Castrating Pliers

Just bought some off ebay for £7.99 all in
06/10/2011 12:28:00
Thanks for all your replies I just need to find some for sale
06/10/2011 10:56:47
Many years ago my father had a pair of pliers that had 3 jaws perhaps 50mm long which were bent at 90 degrees leaving 20mm bent.
When you squeezed the handles the jaws moved outwards evenly spaced at 120 degrees.
they were for stretching rubber sleeving over wires.
I'm looking for some now and dont seem to be able to find any.
A name might help?
Thread: Parts for Bantam Lathe
27/09/2011 13:41:54
I had assumed you had tried colchester
my parts were in the region of £ 400
the parts from moores were < £100
27/09/2011 11:53:19
Hello Mike
I had teh same problem with my colchester student
I bought a length of acme LH thread of the same pitch and diameter and a bronze nut and made one to suit.
I bought it from
Very helfull and reasonable prices

Thread: Myford large bore Super 7 for sale
07/09/2011 16:01:30
Nor me
Thread: Reaming a pinion, wall thickness?
01/09/2011 19:35:54
Why doesnt the pinion fit the shaft to start with?
Is it a scratch built heli you are making?
if not what do the manufacturers of the pinion want that to fit...5.75 seems a funny size to arrive at when the motor shafts are 6mm or are some motors 5.75?
Thread: what thread is this?
25/03/2011 12:04:55
Well after all you guys fine advice, I decided to buy a chinese die to match my tap so it will be 12mmx1.0 LH and hopefully just run the die down the spindle so it will be reasonably standard then ...just the delivery time from was only £8 in total though.
Problem with making a new spindle is thats theres a bearing cup threaded onto the middle of the spindle so making a new one of those starts getting complicated if i just leave the bearing cup on the oversize thread and cut down the exposed thread on each end.
22/03/2011 19:25:08
How do you accuratly check the thread angle on such a fine form?
I have lots of pitch gauges and only the 1mm fits perfectly.
what other thread form would correspond to 12.15mm and 25.4 tpi?
22/03/2011 14:32:26
Thanks for your replies guys
the thread is definately 1mm with my pitch gauges 24,25 and 26 tpi dont fit at all
Its just the odd diameter
I do have a lathe and have cut quite some threads but never left hand and so small internal..
Is anyone near sheffield who would be prepared to do the job?
I have ordered a 12mm die from china but delivery is 2 weeks or so
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