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Rough design info and some of my thought processes whilst designing this gizmo. I have probably altered some of the ideas to improve functionality and ease of use. Video at http://vimeo.com/18780151 with additional pictures at http://s917.photobucket.com/albums/ad19/picclock/Cheapo...

Rough design info and some of my thought processes whilst designing this gizmo. I have probably altered some of the ideas to improve functionality and ease of use. Video at http://vimeo.com/18780151 with additional pictures at http://s917.photobucket.com/albums/ad19/picclock/Cheapo...

I'm about to start manufacture of a part which requires a 10mm dia steel tube brazed into a 10mm thick steel plate. The rod is hardened steel and needs to be at right angles to the surface of the other part. Problem is that I need to allow about 4 thou clearance to allow the braze to flow (2...

This is the first time I've ever contemplated using a drawn cup needle roller bearing and I'm a little unsure of the process and problems/issues. I'm intending to use it in Aluminium and I'm puzzled about the housing tolerances. My intended size is 10mmx14mmx10mm. The table on the right...

I need a pair of bevel gears for 1:1 right angle drive to operate an inlet valve. Sadly I have no idea how to manufacture same. I have a lathe and mill but the way I see it I think you would need a shaper to make these. I looked up prices to buy ready made and needed to sit down after the shock...

I've been clumsy enough to break another M3 tap and need to remove its remains. Most of the spark eroders I've seen use a wire which is fed into the work and a current limit, usually light bulbs. This leads to continual wire adjustment. However on you tube I saw a spark eroder using a door bell...

I'm in the process of designing a pump which needs to have slots cut into the cylinder for the inlet - similar in some ways to a 2 stroke. Normally on projects like this I would just use a floating O'ring seal as thse seem to work well and live long. However a side port will likely rip it to...

I need to braze a 40mm steel disc to a piece of 15mm steel plate, with a 1mm deep location recess for the disc. For me this is a large piece to braze, and I have ordered a larger torch to ensure sufficient heat. My real issue is how to feed the silver solder into the joint. For small work I...

My small 4 jaw lathe chuck wasn't holding some 3mm steel very well so I thought I would use the ER32 collet chuck from the mill, held in my 4" 4 jaw. So I align it central using the outside of the chuck as a guide. Insert collet and 3mm steel rod and check the runout. Its hopeless so I adjust...

I am having trouble threading silver steel on my lathe. The problem seems to be that the point of the threading tool (HSS) seems to break off. I have never managed to cut a 'good' thread in silver steel, the finish is always rubbish despite trying different lubricants. The cut surface is rough...

I have a requirement coming up for a 'snail' shaped cam. basically this will raise a rod then drop it, rather like the water wheel powered hammers but only once per revolution. Has anyone got any ideas on how to fabricate something like this. With CNC mill its an easy solution, but I don't...

Hi Does anyone have any info on how to achieve a very high finish on this material ? First attempts are not encouraging. I was wondering about going over it with a hot air gun or some sort of solvent. It just needs to be very smooth rather than dimensionally critical. Many Thanks picclock

I've managed to break an M3 tap into mild steel part. Its a large part with a lot of hours so I'd rather attempt to remove the tap than remake. Its in a blind hole around 7mm deep. I have a diamond bit which came with my dremel tool which is 2.35mm diameter and about 9mm long. I figure that If I...

Hi knowledgeable experts. I have two pushrods offset radially, which having pressure seals, need to be moved axially. One pushrod activates the other via the linkage. I have seen pictures of beam engines which use a linkage at one end of the beam where it connect to the cylinder, and am...

The title says it all. The metal is mild steel. I plan to drill to 4.5mm then get the final size with an endmill, as the finish seems superior this way. I need a good finish because a 3x1mm oring will slide in here (3mm id, on a 3.6mm id groove giving 20% squash or so. I can adjust the groove ID...

Seems a little crazy but I have a need to make some adjustment threads tight so that I can repeatedly set them and not worry about them loosening or altering. The threads in question are M6 internal, using cap head screws. I want something like those nylock nuts in terms of friction. The only...

Hi I'm silver soldering a shaped pad onto the outside of a cylinder to thicken the wall thickness for a fitting thread. Unlike most of the silver soldering I've done I need to preserve the inside of the cylinder, preventing oxidation. I would also for aesthetic reasons like to minimise any...

(Mods, I know this is way off topic, but I swear the forum members here are the smartest people I know, so please move to the break room if you feel it is too inappropriate) So I'm building this sight glass that will double as a level sensor and I figure I can use the critical angle of a light...

Hi I am in the process of 'designing' a system with a pressure valve which needs to be opened periodically with lowish force, so direct acting is out of the question. The pressure on the opposite sides of the valve will vary so offsetting it with a spring is not going to do it. I have considered...

I'm using a 1mm 2 flute HSS mill for cutting a long slot in 6061 aluminium. My maximum machine speed is 2000 rpm. I plan on using a 0.3mm depth of cut. Can anyone help with the feed rate ? Thanks in advance picclock