Hardness tester

[SmithDoor]

Comparing the one purchase in the 1970’s and the one from Flexbar​

​ Here pass from 1970’s patten too. A ball drop Today's hardness tester A ball drop notice the size. size ⫷-❋ Rutland 1970’s ❋-⫸​ . This side I use on I purchased in the mid 1970’s I have posted this side only since 1999. one first got the Kro printer for drafting in 1979 I hardness for ½" plate since most die work using ½" stick and only side showed ======== Flexbar ========​ This today's $279.00 you buy new 2025 ==This how look from Rutland mid 1970’s== This is how came brand new in mid 1970’s. The above is side post since 1999 on groups. They used Millimeter in the mid 1970’s WHAT I SAY IS Hight lite to see {- COPY CAT -} WHAT DO YOU THINK?

 

[SmithDoor]

⫷*Roughness/Finish*⫸
⫷*❋ chart ❋*⫸
​

Most production machine Shop will have this for both quoting and doing the work.

This also used in design , engineering and draftsman so the finished what they want on part.

This not used in most repair machine shops

This finished can change the cost of making the parts.
This where I used is beside the design /drafting board.
I First start with black plastic and later purchase the chrome one for better view.

So if see this on drawing you are working you will know more about what the designer had in mind

Dave

 

[SmithDoor]

Hi Dave,

Looking at your drawings I do wonder if you have missed out a "0" ! Right at the top where you have put 3cm is 30 mm, should that not be 30 cm.

When I get my hands on a suitable perspex tube I will build one ! It should be very useful when hardening material.

Thank you I fix the 0 .
I am not a mm person almost was in inch. I also on chemo too.

The Flexbar looks Tobe a close copy.

Do you know one of uses for a machinist hammer on ball is for checking hardness and for making gaskets too.

Dave