20V shim micrometer

[oldeskewltoy]

Fowler 1/2" caliper 52-230-000-0

• 0-1/2" micrometer by .001", Satin chrome finish.
• Forged steel frame
• Anvil and spindle hardened and precision ground with microlapped ends
• Clear, crisp graduations on barrel and thimble.
• Diameter of measuring faces: .197"
• Flatness: .00003"
• Parallelism: .00005"
• Accuracy: .001"
• Range: 0-1/2"
• Includes case


The diameter of the measuring faces of this caliper =.197", which = 5mm. So if you are doing valve adjustment on 20V head[s], you may want this tool to check shim thicknesses.

[oldeskewltoy]

works for me.... managed to get this clients 20V to the tighter side of the spec, then the looser side it had been.






Exhaust were .018"-.020", they are now much closer to the tight end with 7 between .015", and .016", and a single one @ .017" - because I didn't have another shim that was either .001", or .002" thicker then the one in there, and while a tiny bit looser, it is still .003" tighter then it was when it came to me. On the intake side - all the clearances are between .007 and .008, they ALL had been .011"


Biggest problem I need to solve - a method to mark the shims so I don't have to constantly remeasure... also.... Need to get more shims... AND a 20V shim box

[kazi]

Need to get me one of these for when I get round to doing the 16v

[Bean]

Get yourself a sorting tray thingy, that seems to be an easy way of keeping track of the thickness. Bonus you can keep any spares in there too

[d3nso]

Bean is right get something like this:

[Project D]

Personally to mesure shim I use (something like) this:

When you have a lot of them to measure, it goes way faster than with a micrometer.

[oldeskewltoy]

(12-21-2017 11:33 AM)Project D Wrote:  Personally to mesure shim I use (something like) this:

When you have a lot of them to measure, it goes way faster than with a micrometer.

very nice..... but currently outside my budget... I don't do enough 20V's YET.......


as to a tray, or sorting for the 20V shims... I'm kinda in/at a dilemma point right now... not enough spare shims to actually begin a kit yet.....




This is my 16V kit... and as you can see, due to machining tolerances... I have 16V shims down to a thousandth... there are about 500 shims in this kit. For these I use a dial caliper that measures in thousandths

[Project D]

(12-21-2017 05:58 PM)oldeskewltoy Wrote:  very nice..... but currently outside my budget... I don't do enough 20V's YET.......

Yes if you go for the Starrett in the picture it is expensive.
But there are similar products who are affordable (That is why I added "something like")

Exemple: Fowler Indicator and Stand Combo 52-580-109 -> ~$150
(If you already have a dial indicator, the stand alone is ~$80)
Sure it is 3 or 4x the price of the micrometer, but it is not out of reach.