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[Metrology] Looking for a good depth Mic..?

EmilioG

Active User
H-M Supporter-Premium
#1
I'm shopping for a new/used depth mic and leaning towards the Starrett 449 blade type/non-turning.
What are your fav's what do you like and what don't you like, comments, suggestions all welcome.
Thanks
 

ghostdncr

Active Member
Active Member
#2
B&S round spindle. I bought mine thirty years ago and have never found need for anything else, although I did grind up some new rods for 0-1" and 1-2" with .062 diameters on the ends for thinner work.
 

mikey

Active User
H-M Supporter-Premium
#3
I have a Mitutoyo 129-type depth gauge with the interchangeable rods and the Mit 7200 dial depth gauge, an indicator with a depth base and interchangeable extensions. Both read in 0.001" increments. To be honest, I use the dial-type more often - quicker and easier to read and much faster when comparing depths of surfaces.
 

Bob Korves

H-M Supporter - Premium Content
H-M Supporter-Premium
#4
I have a Starrett 445 set with rods up to 9" plus spares, a B & S smaller set, and a Starrett 463 mic. head with a small accessory depth foot on it. I use the 463 head for most simple work, and it fits into tight places and is smooth and easy to get a good feel with, the bane of depth mics. To me, smooth and calibrated rules. With my 0-9" set, purchased used and with new Starrett rods having been added, I have no idea if it is properly in calibration for every rod, so I calibrate it for each different one I need to use and then mark it as being calibrated. About the only advantage to buying a quality new set is that it is likely properly calibrated. A cheaper or used set will need to be tested and possibly calibrated for each rod length...
 

EmilioG

Active User
H-M Supporter-Premium
#5
I just bought a Starrett 449 with 5 blades. 0-6". I like the non turning blades and this tool can measure thin slots and recesses.
I'll post pics when it arrives. Now I'm looking for radius gages. I see they only go to 1/2" Are they available in larger sizes?
I've had to resort to using washers for larger radii.
 

EmilioG

Active User
H-M Supporter-Premium
#11
Yes, I thought of that Mike, if I can't find the right diameter, that will be the next step. I'll use aluminum though.
Bob, thank you. That's a good starting point. It was right under my nose, Msc.com
I always wait for the sales. The radius I'm looking for is R .89"