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Yes I got carried away  :clap:
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I'm amazed your date has any stamp left after that!  ;-)

Sent from my SAMSUNG-SM-G891A using Tapatalk

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Gallery / Re: Precision indicator stand
« Last post by PekkaNF on Today at 07:53:25 AM »
Now I need to figure out where to put the knows and size. I have a bag of small M4 thumb screws to try...they are too small for this one.
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Gallery / Re: Precision indicator stand
« Last post by PekkaNF on Today at 07:42:16 AM »
Sawing was a balancing act. 80 mm OD 0,8mm saw arbor has 3 mm portrusion at the bottom. I.E. blade will clear the vise bit over 3 mm - that is the blade offset from the vise jaw and leaves little to mount.

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Gallery / Re: Precision indicator stand
« Last post by PekkaNF on Today at 07:37:52 AM »
Dovetail is pretty small,



I made it to these measures, but in the end it came out slightly oversize....I milled it to dimenssion and tried the DTI, it would not fit, enlarged the slot for 0,25 and it was still sticky, removed all the burr and it was loose....Compared it chinese holder and Swiss and then it did not feel that bad any more.

I shoudl have used pins to measure the dovetail...tired it after it was finished and it showed that when right pin size is sellected it gives pretty good indication of the dove tail dimension.

Nice vid here:
=1031

Frigging frig doest not accept time, ok intention is at 17:20 - dovetail measurement with pins. In tis size thread measurement wires.
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Gallery / Re: Precision indicator stand
« Last post by PekkaNF on Today at 07:30:11 AM »
Because I don't need to use round 8 mm mount, I could modify measuremets a little out of 10x10mm, to 9,5x11 mm, which gives me a little more margin on next step.

I much anticipaed milling the 3 mm oval ....I had ONE 3 mm carbide mill and that has 8 mm cut length. See the problem there when it has to pierce nearly 10 mm.

I drilled the 3 mm hole with carbide drill and expanded the hole 2 mm c-c. I set right table hard stop before drilling and left table stop with 2 mm feeler gauge stack. I advanced mill down in 0,5mm steps and slot in X-axis.

Drilling and tapping went without problems. I tapped both holes trough....I needed to try knobs before comitting to which directions to make clearance holes.
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Gallery / Re: Precision indicator stand
« Last post by PekkaNF on Today at 07:19:41 AM »
Drilled the hole on ball on lathe, no problem there.

Then I turned the 15 mm OD silver steel spigot to 4 mm and fitted that to ball.

Next step was to mount it to square ER32 block. Only consideration was how much to stick it out. Obiviously I don't want square block ER nut and mill ER25 chuck nut to collide way before adequate length is milled.

Squaring the round went pretty well
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Gallery / Precision indicator stand
« Last post by PekkaNF on Today at 07:10:50 AM »
Robin Renzetti - Stefan Gotteswinter -style

interweb:
http://gtwr.de/projects/pro_rore/index.html

tube:




materials on first parts:

* Indicator clamp S.G. "1.2767 toolsteel and will later be hardened to about 45..50HRC:"

I used 15 mm OD silver steel, Böhler K510 SILVER STEEL - 1.2210

Main driver being that I don't have Keats/prism chuck and it needs a turned feature to start with. 15 mm round has over 10 mm square hiding inside and screaming to be released.


*10 mm ball

S.G. used hardened balls and grilled them with HM-drill. I don't have drill that eats hardened steel for lunch, ordered 10 mm relaively soft balls:

https://simplybearings.co.uk/shop/p221140/10mm-Diameter-Grade-100-AISI-316-Stainless-Steel-Ball-Bearings/product_info.html

10mm Diameter Grade 100 AISI 316 Stainless Steel Ball Bearings
AISI 316 Stainless Steel with a hardness of 25 - 39 Rockwell Scale equivalent to 140 - 160 HB (Brinnel Scale).
..
Unhardened austenitic stainless steel with good corrosion resistance to sea water, dilute nitric, sulphuric and acetic acids, photo chemicals, inks, bleaches, dyes etc.

Can be machined / drilled
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The Water Cooler / Re: Lightning strike
« Last post by naffsharpe (Nathan) on December 15, 2018, 05:12:18 PM »
Hello all, from a very windy and wet North Wales ! Today has not been an" outside" day so I finally got to grips with this replacement PC. It obviously works as I'm posting this from it and I have to say I'm very pleased with it. For the first time in many years I have an uncluttered computer ! I've resisted (so far) putting too much on it but I'm sure that will change. Memory has been brought up to 16Gb to make the most of a 64bit O/S . As Russ suggested , matching of modules was not required although I did fit 4 x 4 Gb from the same manufacturer. I pulled out 2 x 2Gb from differing manufacturers , 1 Samsung and 1 HP , so were do Dell PC's gain a reputation for being "fussy" about  RAM ? Anyway it's working well and I'm happy . To aid with future protection against lightning strikes I'm looking at "blitzortung.org" on a regular basis, surge protection has been added to the phone socket (thanks to a fellow forum member on Model Engineer ) and we are in the habit of unplugging at night, so hopefully kit will last longer. I'm very happy to tout Morgan Computers to any UK member. As they had accepted my order for a win 10  64 bit machine before realising they'd run out , they , at their cost had a win 7 64 bit upgraded for me. I gain a larger HDD and a newer machine as checked using Dell's service tag and for the same price , their memory was a bit pricy so I ordered that from elsewhere. My next job is to find a decent low latency external sound card and a slimline PCI soundcard. If I have those in stock then I've covered my options for audio should I lose onboard sound and I'll still have the option of fitting a PCI ethernet card. All in all I'm a happy bunny tonight . I'm staying indoors tonight incase any bunny hunters are around!! Nathan.
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Project Logs / Re: Building Wildings Tower Clock
« Last post by chipenter on December 15, 2018, 03:02:03 PM »
Pinion steel is hardened and tempered to a similar hardness to alan keys .
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