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08-21-2002, 08:30 PM
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#1 |
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Registered User
Join Date: Apr 2000
Location: Chester County PA, USA
Posts: 1,228
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Valve Spring Micrometer
I just got a Tavia valve spring micrometer from Summit and am dissapointed in the quality for the price i paid. The mic is suppost to be accurate to .001 but the graduations are to .005 .. At 1.700 the threads have .01 slop and when you turn the barrel the threads get tight then loose, tight then loose.. I know that acceptable valve spring tolerance is +- .02 , but this tool falls short of being called a micrometer in my opinion. Does any one know where i can get a quality mic?
Randy
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72 k/10 short wideside 72 k/5 Blazer 72 K/5 Blazer - obstacle course racer 72 custom/10 8' bed 70 K/5 Blazer 67 C-30 GMC Flat bed 86 GMC K2500 Plow Truck 85 GMC K3500 84 M1008 85 M1008 77 G30 Motor Home 72 Sears 12hp Tractor Glenmoore, Pennsylvania |
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08-23-2002, 01:51 PM
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#2 |
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Senior Member
Join Date: Jul 2001
Location: Muskegon,MI,USA
Posts: 6,026
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Have you considered a digital caliper? I use mine for lots of measurements and it is pretty accurate. I like it because it repeats, can be zeroed out, and it is for id and od measurements.
Jim |
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08-23-2002, 04:05 PM
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#3 |
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Registered User
Join Date: Apr 2000
Location: Chester County PA, USA
Posts: 1,228
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I cant get down in the spring pocket with the I.D. anvils on a dial caliper.
Randy 
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72 k/10 short wideside 72 k/5 Blazer 72 K/5 Blazer - obstacle course racer 72 custom/10 8' bed 70 K/5 Blazer 67 C-30 GMC Flat bed 86 GMC K2500 Plow Truck 85 GMC K3500 84 M1008 85 M1008 77 G30 Motor Home 72 Sears 12hp Tractor Glenmoore, Pennsylvania |
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08-24-2002, 04:58 AM
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#4 |
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Recovering Truck Driver
Join Date: Mar 2002
Location: Orleans, NE USA
Posts: 1,883
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you might try Starret, they make some high quality measuring tools, not sure about a valve spring mic though.
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67 K-20 350, SM465, Eaton rear, 4.56 no spin option 00 Dodge 2500 4x4, 24V cummins, 5 speed Chad South Central Nebraska |
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08-24-2002, 10:37 AM
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#5 |
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Senior Member
 
Join Date: Jul 2000
Location: North Texas
Posts: 3,444
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I simply use a 6" steel ruler with graduations at .100" and .010". I can definitely tell the difference between 1.690", 1.700", and 1.710" installed height. And that's good enough considering the smallest shims I can find are 015". If you need more acuracy, use a maginifying glass -- seriously! I have a cheapo plastic one that I use from time to time. Yeah, plus or minus .020" is probably good, as long as you're not flirting with coil bind. Crane recommends a .060" margin of error when calculating max lift for a spring at a given installed height.
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Mike 1969 C10 LWB -- owned for 34 years. 350/TH350, 3.08 posi, 1st Gen Vintage Air, AAW wiring harness, 5-lug conversion, 1985 spindles and brakes. 1982 C10 SWB -- sold 1981 C10 Silverado LWB -- sold, but wish I still had it! 1969 C10 (not the current one) that I bought in the early 1980s. Paid $1200; sold for $1500 a few years later. Just a hint at the appreciation that was coming. Retired as a factory automation products salesman. Worked part-time over the years for an engine builder and a classic car repair shop. Member here for 23 years! This is the very first car/truck Internet forum I joined. I still used a dial-up modem back then! Last edited by MikeB; 08-24-2002 at 10:40 AM. |
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