2021 POTD Thread Archive

[Winegrower]

Yes, Joe065. Pressed on. That was about as simple as I could make it.

Yep, I bet we have all had an edgefinder stuck.

 

[Tim9]

I saw a youtube video made by Stephan G who compared several styles of edgefinders. His conclusion was that the most accuracy/repeatability was with either a DTI rotated zero to 180 degrees and some math performed, or a ball bearing on a shank held in a collet where you run the bearing up until it touches, then move half the bearing diameter to find zero. The DTI stuff is just too cumbersome to set up and mess with, for me.

I have a cylindrical "kick out" type edge finder but it's always the case that it doesn't fit whatever collet is in at the time, so take out the collet, put in new collet with edgefinder, find the edge, remove collet, put original collet back in. Tedious.

So this morning, I made three of the ball bearing style finders, with some 22mm OD, 8mm ID bearings that I had just for inventory. I made three shaft sizes, 3/8", 1/2" and 3/4", as these are the collets I tend to mostly use. I turned the end of the shafts down to a press fit on the bearing ID, used the little 1 ton arbor press and presto.

The interesting and I think terrific thing about these is that by putting some Sharpie marks on the bearing, it becomes more user friendly to old eyes than the kickout type finder, where it's always kicking out on the far side of where I am. These marks are of course invisible when approaching the edge (500-1000 RPM) and obviously easy to see when the bearing is completely stopped upon contacting the edge. But there will always be a little runout in the system, and as the bearing contacts the edge at some point in the rotation, the bearing stops and like a strobe light, you see the mark for a millisecond or such. You have to try this, it's great. I found that I could get a half thou readout difference between no contact, strobe-like appearance, and stopped, which is the resolution of my DRO. This is, for me, a sharper indicator than the kickout finder, it's easier to see and I don't have to get my head down in the works to observe. The clincher is repeatability was better than I can achieve with the kickout finder.

You have to try this. Took about an hour and a half to make all three of these and test them. I'm sure you can do this faster. I putter.

If you're working in metric, the bearings I used were 22mm, so just move 11 mm to center. Working in imperial, I just find the edge, zero the DRO, flip to mm, move 11 mm and flip back to inch. These bearings are all very very accurate of course, just a few microns variance max to min.

I give up on trying to get pictures to orient correctly. A pox on certain software developers.

That’s very cool. I’m with you in that the stupid 3/8” diameter edge finders is a useless shank size. I do most of my machining with 1/2” end mills and it drives me bonkers having to swap collets for the edge finder. I actually purchased another used wiggler edge finder off of eBay and mounted the 3/8” shank into a 1/2” sleeve.
But, I think I’ll make a couple of those bearing types too. I’m always searching for a tool like that . Mainly because I didn’t put my tools back where they belonged

 

[Braeden P]

I don't spend much seat time on any red tractors. My dad broke the mold and went with green tractors. IH was top dog for a long time but I still prefer green.

if it aint red leave it in the shed

 

[projectnut]

That’s very cool. I’m with you in that the stupid 3/8” diameter edge finders is a useless shank size. I do most of my machining with 1/2” end mills and it drives me bonkers having to swap collets for the edge finder. I actually purchased another used wiggler edge finder off of eBay and mounted the 3/8” shank into a 1/2” sleeve.
But, I think I’ll make a couple of those bearing types too. I’m always searching for a tool like that . Mainly because I didn’t put my tools back where they belonged

Edge finders come in a variety of shank sizes. I have Starrett and no name ones in 3/8", 1/2" and 10MM.

STARRETT Edge Finders

ApplicationsFor fast accurate work location.FeaturesBody and contacts made of tool steel, hardened, ground and lapped to close tolerances for concentricity.Supplied in plastic pouch.

www.travers.com

TTC PRODUCTION USA MADE Edge & Center Finders

Superior qualityApplicationsWorks well on round or straight surfaces. A pointed surface may be picked up by rotating the spindle past the point, as in a round piece.FeaturesHardened and ground on all working surfaces.

www.travers.com

TESA BROWN & SHARPE Edge Finders

BenefitsSingle edge finders allow you to find workpiece edges when performing milling machine work.Dual-function (double) edge finders also finds hole centers.ApplicationsHelps ensure accuracy by making an audible click when the tip jumps.FeaturesHardened and ground on all working surfaces.

www.travers.com

They're some of the least expensive tools you can buy. They usually cost between $15.00 and $35.00 depending on the brand and size.

 

[tjb]

Edge finders come in a variety of shank sizes. I have Starrett and no name ones in 3/8", 1/2" and 10MM.

STARRETT Edge Finders

ApplicationsFor fast accurate work location.FeaturesBody and contacts made of tool steel, hardened, ground and lapped to close tolerances for concentricity.Supplied in plastic pouch.

www.travers.com

TTC PRODUCTION USA MADE Edge & Center Finders

Superior qualityApplicationsWorks well on round or straight surfaces. A pointed surface may be picked up by rotating the spindle past the point, as in a round piece.FeaturesHardened and ground on all working surfaces.

www.travers.com

TESA BROWN & SHARPE Edge Finders

BenefitsSingle edge finders allow you to find workpiece edges when performing milling machine work.Dual-function (double) edge finders also finds hole centers.ApplicationsHelps ensure accuracy by making an audible click when the tip jumps.FeaturesHardened and ground on all working surfaces.

www.travers.com

They're some of the least expensive tools you can buy. They usually cost between $15.00 and $35.00 depending on the brand and size.

There are many advantages to having a large family: one wife, four sons, one daughter, four daughters-in-law, one son-in-law, eleven grandsons, two granddaughters, and one grandson-in-law. When a crowd that size pools its resources, you can get something you want for your birthday that you could NEVER justify purchasing for yourself in a hobby shop. Best edgefinder on the planet (man, these things have gone up):

Haimer Universal 3-D Sensor with 0.200" Ball Dia. Short Probe Germany | eBay

Short Probe Germany. The 3D-Sensor is clamped into a tool holder and inserted into a milling spindle. Once clamped into the machine spindle, the run-out (T.I.R) is fully adjustable to Zero. Tolerance(+ -): with short sensor insert: Radial 0.0004", Axial.

www.ebay.com

 

[FOMOGO]

If it ain't blue shame on you.

if it aint red leave it in the shed

 

[rwm]

I have been eyeing a Haimer for some time. How did you decide which one to buy? They make a mini also.
Robert

 

[Braeden P]

If it ain't blue shame on you.

farm with a farmall

 

[projectnut]

I've always been partial to the IH series of the late 1960's and 1970's. The 1066, and 560 come to mind as far as 2 wheel drive machines are concerned.

1962 IH 560 Diesel And 60 Plow at Gone Farmin' Tractor Spring Classic 2016 as S121 - Mecum Auctions

1962 IH 560 Diesel And 60 Plow crossing the auction block at Gone Farmin' Tractor Spring Classic 2016 as S121.

www.mecum.com

Used Farm Equipment for Sale | Machinery Pete

Find used farm equipment for sale near you. Browse the most popular brands and models at the best prices on Machinery Pete.

www.machinerypete.com

I'm also partial to the 45 series articulated machines.

TractorData.com International Harvester 4568 tractor photos information

www.tractordata.com

For some reason they just extrude power even when standing still. I'm sure in the scheme of things there are many newer machines with more power and more amenities. However these machines just look like they are built for work.

 

[Braeden P]

my grandfather has a 1066 that thing just looks powerful

this is a story about that 1066 he broke the knuckle casting and would not fix it always saying that it will cost him $800 so other problem happened then he hit a gofer hole and the whole front axle rolled under and that cost $2000 to fix...dont be cheap