Here is a list of all the postings fizzy has made in our forums. Click on a thread name to jump to the thread.
|Thread: To Pin or Not To Pin|
Also bear in mind that whilst loctite may state that you have 10 minutes playing time before it cures to such a degree as to make manipulation by hand impossible I have found almost without exception that the true time is just a few seconds (I favout 272 for general fixings as it doesnt run). I would pin the crank.
|Thread: Hints and tips for cutting small(ish) male threads with a die|
I dont do metric but thats pretty much 5ba...I wouldnt wind it by hand, I would use the lathe back gear. If its stripping threads you need to open the split die as far as it will go and try a run. Always use lubricant. The dia of rod is dependant upon your application but it is not unusual to aim for a 3/4 thread engagement. For such small threads it is often much easier to buy threaded bar and locate into a tapped hole with loctite. Good luck.
|Thread: Screaming brass|
Its cz121, it gets used on my boilers for burners and chimney parts and I use a lot of it up to 3" diameter down to 1/4" diameter. It honestly never makes so much as a squeek and I sometimes run it extremely hard in terms of cut depth and feed (you know its OTT when the 3/4" boring bar starts to bend!). What I have learned is to cut it at a relatively low turn speed. Ive got a fixed high speed lathe which refuses to cut brass. I now always use ccmt super sharp inserts, they cut very cleanly. If you are near me I would gladly help you resolve this issue hands on?
Nigel (Pendle Steam Boilers)
|Thread: Aluminium cylinder, Viton rings|
Hi Bob. In a word, no. Definately not a good idea as it oxidises quickly when subject to steam. Your first run will probably be fine but after leaving it standing the bore will oxidise and make subsequent running worse and worse. Personally I would never use O rings as piston rings (I know some do with success) as they have no self lubricating properties, instead I would use graphite yarn for longevity.
|Thread: Screaming brass|
Hi. I turn brass pretty much every day and have never ever had it make any noise - nothing. I can only assume its a special grade or that your tool is rubbing not cutting. I find tips for steel useless as they sheer rather than cut, prefering very sharp inserts instead. Im making a batch of chimney collars today, all brass.
|Thread: bronze or brass|
Im not re-reading it all again but im sure the new regs state that boiler bushes have to be bronze. As for the fittings themselves, to the best of my knowledge all commercially availible are made from brass. At Pendle Steam Boilers we moved to Bronze bushes a few years back much to the frustration of our cnc parts maker who now has to change his tooling more frequently!
|Thread: Battery longevity|
I bought a digital watch 26 years ago to go diving in Turkey when we got married...I swear its still on its original battery and still working - how???
|Thread: Current leakage om CNC|
I am indeed using an extension lead, two infact albeit only 4 ft long each. I will test as advised but go away tomorrow for a week so lack of response on my part will ensue, at least for a week. Lots to ponder and plan whilst away, thanks again.
Indeed the stepper motors are under 40v but the spindle motor is 110v. I have a new, unopened motor somewhere so I will swat it out and retest. Thanks all.
its a chinese set up but the plug has earth. I connected the bed to the trolley, not realy n earth but makes part of the circuit. I dont think there is a workshop wiring fault as it is installed to Iee regs.
If I touch the inside of my wrist against my cnc bed I get a highly unpleasant shock. Ive experienced the same sensation with laptop computers but given that there are just 3 stepper motors and a drive motor I wasnt expecting this to occur. I tested the bed to earth and got 120V @ 5 uamps so virtually no current to speak of. Is there anything I can easily do (other than not touching it) to reduce this? Its all on wheels on a concrete floor. Thanks
|Thread: How can this work?|
Bob, thats what I thought but it seems odd to put them in the picture? This is mine made 1948
I have just found this rare Haighton and Grindturn Lathe at my local scrap dealer and intend to restore it back to original detail. My version has the two vee belt pulley on the motor shaft but only one big pulley on the reduction part. My question is, why does the picture from the original advert show two belts as it wouldnt run like this - or am I missing something?
|Thread: Superheat or not?|
There is a thread on here somewhere which goes into great detail on this subject, with lots of for and against views. The upsum of the thread was that they arent essential but the boiler will use less fuel and make more steam with them used. But there are good superheaters and bad ones...another story.
|Thread: Tony from Burnley|
Hello fellow Burnley person! If you ever need a steam boiler you wont have far to go. Ive all but stopped selling on ebay as the fees are very high and as a seller you have next to no rights....nightmare.
|Thread: Different ways of boring a hole|
I avoid boring with the mill as the feed (assuming vertical mill) has to be applied by hand. In the lathe the feed rate is taken care of by the machine making the process controlled.
|Thread: Electric Cars|
Im off to france with my caravan...2000 mile round trip. Wont be doing it in a leccy car any time soon.
Hi Baz - they are 1.5mm with a bit too fast feed rate. Slow the feed right down and 6mm is good.
and here is a video of me using it to drill holes in one of my burners - I had 100 to make so needed a hands off solution. Only snapped 2 drills so far and that was through sheer stupidity - not short of that! Pendle Steam Boilers CNC drilling
Want the latest issue of Model Engineer or Model Engineers' Workshop? Use our magazine locator links to find your nearest stockist!
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.