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Low stress threading procedure, but maybe not if you have a screw-on only chuck

https://www.youtube.com/watch?v=Z-dqOi_z5bk

Threading away from the headstock

I was emulating the GadgetBuilder setup (link below) but using a vice and collet block in the grinder

The geometry is easy enough to achieve, but accuracy and repeatability not so easy

I had...

I checked the collet / block with a piece of bright bar, it was true, or pretty close

Then I did the same with the drill, maybe with the point protruding 30 mm or so, it was a bit out, not much,...

Success... 16mm drill is fine, looks like an er40 collet is only good for 19mm of so sized drill

I tried with a 16mm drill, it's held concentric, pretty much. Facets turned out fine, resulting...

I've been messing about with 4 facet sharpening, using a 3-way vice and a 4 sided ER40 collet block to hold the drill in a T&C grinder

Most frustrating trying to get the facets to cross nicely and...

Emmentaler I suspect, just like mine

Annoying, I thought about fixing it, but it's only a drill press vise, and function's not affected - cosmetic IMHO

I'd think the more important sliding...

I've made the pins, used some softish brass rod, took a while to set the compound to give the correct taper (.57 or so degrees) so I made a few extras.

I noticed that the pin connecting drive...

The pin seems to be a standart metric 5mm taper, the difference in dia over lenght approximately corresponds to a standard metric 1:50 taper, looks like 1.15 degrees on the compound, unless my trig...

Success, got the pin out - finally, bit of a fiddle, the drive collar was pretty tight on the leadscrew, getting it aligned wasn't easy

Locked the leadscrew with the half nuts and carriage lock...

Looks like the shear pin is gone

It seemed to be threading normally till it got to an unthreaded section, I noticed the DRO stop moving when it encountered a bit of load

Guess that's why I...

Seems to have done the trick, I'm sure the leadscrew wasn't turning under power, whem I tried reversing the direction of feed, but then again I may not have been thinking clearly. Maybe I flipped the...

I've managed to crash my lathe while internal threading, just a little too close to the chuck, think I was a little obsessed by the hole rather than what else was going on, it seems to be jammed on...

I knocked up a slightly upscaled jewellers drilling aid (see Clickspring on Youtube)

Very handy on the drill press

It's got a vee slot on one side with a drillguide centred over the vee, you...

Thanks all, Problem solved I think, I hadn't thought of hanging them by the adjuster screw bracket, I was fixated on using the clamp pin holes

The tree's a great idea, but spacewise it doesn't...

I'd like to improve on my storage / accessability of my Multifix style tool holders

Had a scout around the internet and can't see where anyone's done it

Anyone got any ideas ?

oooooh, lengthwise

missed that bit

sounds like a job for the vertical bandsaw, not sure I'd have the patience to feed it through by hand though

starting to sound like a job for a horizontal...

I've got a power hacksaw that'd do the job

I'm in Hampton

If you look at my previous post, the order in my shopping cart just a few minutes ago had $0.00 for delivery.

I'm hardly a high volume customer, just occasional odds and ends

In fact I just...

I've had good luck with them. Their pricing is all over the place, some things cheaper than eBay to others ridiculously expensive, in fact mostly on the expensive side. But you can check the prices...

Spins off..... sound like you could do with a locking arrangement - the photo shows what Waldown have done

Re carbide wheeels, I came across these guys when I was looking up specs on google, their...

Hi Grant,

If you set up a web account with Blackwoods, you can order online, find out stock position etc. then they will deliver to wherever (maybe to work reception) and delivery is free,...

I thought all the "recommendations" about not stopping a surface grinder after the wheel was dressed was that the position of the wheel on the spindle was critical to balance / concentricity. E.g the...

Top bunk !!! - obviously you've done time before

Not sure why a VFD would upset things re balance, if the speed was slowly ramped up you think that the inertia of the wheel would be less likely to...

I chucked it on as soon as I read your post.

Also had a little go dressing with the remnant of the diamond dresser, seemed to get into the wheel pretty well - lots of dust though

Suppose the $4...

It's perfect, I was more worried about balance rather than instant death. In any case it's not doing a million revs and it's well guarded.

It runs much smoother than the old wheel, and I'm too...

You've inspired me to have a look at my stockpile

I must have 200Kg plus of assorted wheels I got with my T & C grinder, but only one green wheel

It's chipped but rings OK, I guess the chip...

I was having trouble adjusting the table to 5 degrees negative, normally the adjusting screw locates in a dimple underneath it. It's an elongated depression, looks as though Waldown put it there, but...

I remembered the 5 degrees, but couldn't remember direction, naturally given two choices, the guess is going to be wrong

For some reason the table's harder to adjust when pointing down, must be...

Here are a few snaps and a little about the initial maintenance

1. Grinder, Waldown picked up on Grays a couple of days ago

2. I must be getting old, or perhaps have too much time on my hands,...

They do say "diamonds are forever"

Talk about a timely response.

Just got the grinder back together after new bearings and rewire

Gave the little eBay diamond dresser a whirl, after what seems like about half an hour of...

Thanks Phil,

I've got both, I bought one of those little eBay things years ago and have never used it, it looked a bit puny when it arrived. I've also got no shortage of old Alox wheels as...

The wheel is shape 6A2 in the attached link

http://www.kinik-abrasives.com/301E0507/img010.pdf

D=150, W=20, X = 3mm (thickness of abrasive

I've acquired a bench grinder with a diamond wheel. The wheel's got a bit of a hollow in it, but there seems to be a fair bit of meat left. I've had a look at the manufacturers website, but there's...

I successfully realigned my lathe using RDM. Just used a length of BMS 38mm or so. It had a ground finish with uniform diameter and was round enough for RDM purposes. It was mounted in the 3 jaw with...

Thanks for the input folks

Now running on the TAFE standard, the FWD UP never felt right

Very inexpensive lathe upgrade I think

Good enough for TAFE is good enough for me

So down for (normally) ON (FWD), and back up to the detent for OFF, just like all the other switches (lights, power points.....) I use

Next job, swap...

Anyone remember which way the Colchesters in the TAFE's were wired ?

If so I'll make that my standard

I think it's sensible to have all machines in a workshop the same

I occasionally run my...

Is there a standard (for Australia) which says which way the spindle control lever should operate?

Is it up for forward, so the chuck direction is opposite to the direction of the lever? That...

..

The two step spindle pulley is 1.50 and 2.75 inches, motor pulley is 3.25 inches (nominal sizes ?).

Spindle pulley is "fixed", the motor pulley has a knurled retaining nut, speed change is just a...

I've got one, it's older, but the motor speed should be the same (2850)

It's fitted with the 3000/6000 pulley set

I'm happy to measure them up if you need the dimensions

Agree wholeheartedly with the little thank you pressie

Also a little review over dinner sounds very nice

John

There are heaps of different collet forms.

It could be Ortlieb (original makers I think, but widely copied)

See http://www.ortlieb.net/en/products/clamping-systems/tool-clamping/collets.html

Undercutting can be done with a piece of hacksaw blade, grind off the "set" on the teeth though (sort of like a safe edge on a file)

Also don't use emery to polish the commutator, use sandpaper....

I've heard reports of the last tour and I'd love to go - in working hours is fine with me

If you think that takes more than one view to get your head around, have a look at this

https://www.youtube.com/watch?v=ccjTMQwKWNs

(quite short video)

Relevant to the course - stiffness

I have plenty of that today after two big days of benchwork and weightlifting

Scraping has a strange effect on density of material, the more you scrape the...

Hi all,

I mentioned this guy yesterday, seems to know a bit

Pretty good explanation of why you might scrape something, I think I'll make it required viewing for certain persons who couldn't...

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