Member postings for Chris Gunn

A 5mm screw will go through a 5mm hole, provided it is in the right place. Using a larger clearance hole gives some wriggle room, bearing in mind the 2 mating components may not have been made in the same place at the same time. Standard counter bores are made for standard cap screws with this in mind.

Chris Gunn

Neil, it depends how big your hammer is!!

Fizzy, It could have been worse you could have tried to catch it.

Chris Gunn

James, EN24 for gears would be good.

Chris Gunn

David, could you have reversed the eccentric rods to connect to the wrong ends of the expansion links?

Chris Gunn

Mark, Oilite bushes are not good at taking heavy and intermittent side loads as would be experienced in this application, for that reason I would not use one for this application.

Chris Gunn

Timothy, you can buy miniature unmachined elbow castings from PM research in the USA, they are not dear and you can put your own thread/hole in them. they do 1/8" and 3/16" inch versions, your 4mm or 5/32 as near as dammit would certainly be possible in the larger size mentioned.

Chris Gunn

https://www.pmmodelengines.com/

Santa brought me a nice new 12.5mm drill, so I am off out into the workshop to start work on a new trailer. Chris Gunn

Mike, I did not think about trying a tapping drill in the hole as Jason suggests, you could try a drill in one of the holes you did not put a screw in, tapping drill for 5/32 x 40 tpi is 1/8", and for 3/16" x 40 tpi it is 5/52". I would not imagine it would be any bigger from what you have told us so far. I can make you a screw to test if it is an ME thread once the New Years festivities are over.

Chris Gunn

Mike if the original builder planned to use commercial drain cocks these would normally be threaded with an ME thread, such as 5/32" x 40 or 32 tpi.

Chris Gunn

I would like to add my thanks as well, plus good luck for the 100 or 4 years.

Chris Gunn

Bob, when I was making branding machines we needed to ensure full heat transfer with no air gaps between the element and the housing, and we used "Heat sink compound" to fill in the gaps. It was a white sticky stuff and stayed sticky, and filled in the gaps.

Chris Gunn

Chris Gunn George it happens to me as well, on this forum and on my emails too, via the BT email. There it goes it did it again!!!

Wolfie, if you were to tell us what bike you were working on or sizes then I am sure someone will know what 86-1234 is. It is more than likely it is or was a commercially made bearing which could be available.

Chris Gunn

David another alternative method would be to make a 3/8" diameter mandrel to slip the gear on, tap say an M5 hole in the end, and hold it in place with a thick washer and a socket head screw, then machine the teeth away gently. Then you can turn the gear around and do the other end.

Chris Gunn

Andy, you need to check the headroom on your mill carefully if you want to tap parts 240mm high, as the part plus chuck plus tap plus centre to guide it or tapping chuck plus whatever work holding device will soon add up. The same applies when milling depending on how you hold the cutter and work piece.

I have a 9" raising block on my Bridgeport which is one way to get extra headroom, maybe this is possible on the milling machines you are looking at.

Chris Gunn

Alan, no hole in my Bantam either, but maybe you could pop another oiler in it as it is over the lead screw, this will keep dirt out and oil on the screw. Could this hole have let c***p in the hole which wore out the lead screw nut?

Chris Gunn

Mick further to my post check out Toolstation who have a selection.

Chris Gunn

Mick you can buy wire brushes for angle grinders, the 4" and 4.5" ones have an M14 thread, and many tool suppliers stock them to fit. You can also get backing pads for sanding disc and flap wheels to fit in place of the grinding discs. Somebody will be along with a link in a minute.

Chris Gunn

CJ, Sorry to hijack the post, but I was interested to read you had surge damage, was this just after a power cut? we had one a few weeks back, a momentary one after which my bedroom clock went haywire. Logic tells me the power cut was the cause, but Western power refuse to pay for a new one citing that no employee of Western power did anything wrong. Has anybody else had items fail immediately after a power cut?

Chris Gunn