• This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn more.
  • PLEASE: Read the FORUM RULES BEFORE registering!

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

EmilioG

Active User
H-M Supporter-Premium Member
Joined
Jul 20, 2014
Messages
962
Likes
334
#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
Joined
Mar 5, 2017
Messages
123
Likes
84
#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 Member
Joined
Dec 20, 2012
Messages
3,026
Likes
2,939
#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 Member
H-M Supporter-Premium Member
Joined
Jul 2, 2014
Messages
4,024
Likes
4,172
#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 Member
Joined
Jul 20, 2014
Messages
962
Likes
334
#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.
 

mikey

Active User
H-M Supporter-Premium Member
Joined
Dec 20, 2012
Messages
3,026
Likes
2,939
#6
Dunno'. My Mit set only goes to 1/2" and its pretty big.
 

EmilioG

Active User
H-M Supporter-Premium Member
Joined
Jul 20, 2014
Messages
962
Likes
334
#8
Thanks. The larger sets are very expensive. I guess I'll keep using washers for now.
 

Bob Korves

H-M Supporter - Premium Member
H-M Supporter-Premium Member
Joined
Jul 2, 2014
Messages
4,024
Likes
4,172
#9
Thanks. The larger sets are very expensive. I guess I'll keep using washers for now.
Of course that was MSC. Could be cheaper at the competition... I used MSC because I figured they would have some.
 

mikey

Active User
H-M Supporter-Premium Member
Joined
Dec 20, 2012
Messages
3,026
Likes
2,939
#10
Thanks. The larger sets are very expensive. I guess I'll keep using washers for now.
I just turn the OD I need from scrap delrin and use that. Seems like I can never find the washer I need when I need it.
 

EmilioG

Active User
H-M Supporter-Premium Member
Joined
Jul 20, 2014
Messages
962
Likes
334
#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"
 
Container Above bottom breadcrumb