Radius gauge and reverse engineering

[tonyfoale]

I recently posted about some reverse engineering that I needed to do to replicate some classic motorcycle crankcases at
http://www.homemadetools.net/forum/h...029#post120271

Continuing on from that I needed to measure some corner and other radii, there are many possibilities for such tasks, for example MichaelMoore recently posted his templates at
http://www.homemadetools.net/forum/r...348#post122031

This current post is about a set of radius gauges that I built using a digital gauge as the measuring element.



I have put the full story in a PDF which can be seen and/or downloaded from:
Tony's radius gauge
I have also written a simple bit of software to perform radius calculations and that is linked in the PDF file. I will also add a video in the next few days.

[yves78]

Thanks a lot Tony : 2 days ago, I was just thinking to build something similar in order to evaluate a radius.

That's very nice to get an idea of your solution for that.

I take also the opportunity of that reply, to thank you for your pdf explanation documents, always clears and usefuls.

[tonyfoale]

Thanks a lot Tony : 2 days ago, I was just thinking to build something similar in order to evaluate a radius.

That's very nice to get an idea of your solution for that.

I take also the opportunity of that reply, to thank you for your pdf explanation documents, always clears and usefuls.

Glad that you find it useful. If you make something like it be sure to post it here.

[NortonDommi]

Thanks, I've put this in the to do list for Winter.

[Toolmaker51]

Thanks, I've put this in the to do list for Winter.

WELL it's winter here, hint hint. Weeks and weeks worth...

[Toolmaker51]

I recently posted about some reverse engineering that I needed to do to replicate some classic motorcycle crankcases at
http://www.homemadetools.net/forum/h...029#post120271

Continuing on from that I needed to measure some corner and other radii, there are many possibilities for such tasks, for example MichaelMoore recently posted his templates at
http://www.homemadetools.net/forum/r...348#post122031

This current post is about a set of radius gauges that I built using a digital gauge as the measuring element.

I have put the full story in a PDF which can be seen and/or downloaded from:
Tony's radius gauge
I have also written a simple bit of software to perform radius calculations and that is linked in the PDF file. I will also add a video in the next few days.

I can't recall anything on the market or DIY anything like it. Seems Tony, you knock two thirds the competition off before they get in the pit let alone on track. Said other way; He's lapping them right inside the shop?

Further; Jon. Is there a HMT.net logo decal for Tony's machine? What an audience!

[tonyfoale]

I have just enhanced the software to allow calculation of the curve radius and centre coordinates when the XY coordinates of three points on a curve are known.
This is useful if you use the DRO on a milling machine to determine the coordinates of three points. This does not need the radius gauge described above.
The link to the software is the same as that in the PDF RadiusGauge.pdf

[tonyfoale]

I have not had time to edit the video that I promised so I have just uploaded a 3 minute unedited version of the most interesting part of the radius gauge construction.https://motochassis.com/FileDump/Rad...adiusGauge.wmv

[DIYer]

Thanks tonyfoale! We've added your Radius Gauge to our Measuring and Marking category,
as well as to your builder page: tonyfoale's Homemade Tools. Your receipt:

Radius Gauge by tonyfoale

tags: gauge, radius

[Jon]

Congratulations tonyfoale - your Radius Gauge is the Homemade Tool of the Week!

Another record-breaking week around here, with many excellent builds. This tool really stood out, and was especially well-documented.

Some good picks from this week:

Mini Lathe Slow Speed Feed by jjr2001
Optical Punch by Canobi
Bar Cutter by jealpaul
Multifunction Scribe by Dimitris Polychronis
Tall V Block by rossbotics
Large Drill Bit Modification by Kovanca Polock
Bandsaw Mount Modification by Steved53
2x72 Belt Grinder by DanLins
Disc Sander by Vyacheslav.Nevolya
Riving Knife by Rorschach
Simple Puller by liberal
Hand Stamp Guide by rgsparber
Turning Saw by threesixesinarow
Bevel Guide by LastingBuild
Extra Wide Chisel by Make Things
Center Punch by Frontier Forge
18650 Battery Charger by Lahis
Plumbing Spanner Wrenches by garage nut
Drain Pipe Indicator by garage nut
Engraving Chisel by Frontier Forge
Zero Clearance Insert by Rorschach
Capacitor Tester by garage nut

tonyfoale - we've added your tool entry to our All Homemade Tool of the Week winners post. And, you'll be receiving a $25 online gift card, in your choice of Amazon, PayPal, or bitcoin. Please PM me your current email address and gift card choice and I'll get it sent over right away.


This is your 9th Homemade Tool of the Week win! One more and you'll join rossbotics and mklotz as a 10-Time Homemade Tool of the Week winner. Here are all of your winning tools:

Horizontal Milling Machine by tonyfoale

tags: mill

Drum Brake Grinder by tonyfoale

tags: grinder, brake drums

Shock Absorber Dynamometer by tonyfoale

tags: suspension, measurement

Valve Holding Collet by tonyfoale

tags: valve, holder, collet

Laser Aligner by tonyfoale

tags: alignment, laser

Double Edge Fly Cutter by tonyfoale

tags: flange, fly cutter

Vertical Bandsaw by tonyfoale

tags: bandsaw

Surface Grinder by tonyfoale

tags: grinder, surface

Radius Gauge by tonyfoale

tags: gauge, radius