6" Starrett 1879 squares - 4 and 6 scribe holes

J

JPRI

Aluminum

Joined

Feb 3, 2012

Location

RI USA

• Feb 8, 2020

• #1

There's another extensive thread on the 12" rules from Type 1 onward.
I previously posted my 1879 square with center head, which has the 1880 reissue date, and 4 scribe holes.
Now I have another, only marked with same 1879 date on rule, and 6 holes.
Anyone else have a 4-holer?

 

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SalemRule

Cast Iron

Joined

Jul 26, 2018

• Feb 11, 2020

• #2

I cannot recall ever seeing a 4-holed rule.

Are any Clamping Nuts Nickelled Brass ?

Are the Scribes missing ?

 

J

JPRI

Aluminum

Joined

Feb 3, 2012

Location

RI USA

• Feb 11, 2020

• #3

Unfortunately both scribes are missing. Both nuts look like nickel, not sure how to tell if brass underneath.

 

SalemRule

Cast Iron

Joined

Jul 26, 2018

• Feb 11, 2020

• #4

JPRI said:

Unfortunately both scribes are missing. Both nuts look like nickel, not sure how to tell if brass underneath.

Click to expand...

Any Magnet will do

 

J

JPRI

Aluminum

Joined

Feb 3, 2012

Location

RI USA

• Feb 11, 2020

• #5

Magnet sticks to both, so steel nuts

 

SalemRule

Cast Iron

Joined

Jul 26, 2018

• Feb 11, 2020

• #6

JPRI said:

Magnet sticks to both, so steel nuts

Click to expand...

Ok, so not SUPER early, but very very nice

 

T

TomBoctou

Hot Rolled

Joined

Dec 29, 2007

Location

Boston, MA, USA

• Feb 11, 2020

• #7

JPRI said:

Magnet sticks to both, so steel nuts

Click to expand...

Magnets stick to pure nickel. They probably wouldn't be pure nickel though.

 

SalemRule

Cast Iron

Joined

Jul 26, 2018

• Feb 12, 2020

• #8

tom_boctou said:

Magnets stick to pure nickel. They probably wouldn't be pure nickel though.

Click to expand...

I did not know that.

Although Nickel was a popular metal for electroplating in the past, I have never encountered any item machined from this metal.

Have you ?

Why is it seemingly never used ?

 

T

TomBoctou

Hot Rolled

Joined

Dec 29, 2007

Location

Boston, MA, USA

• Feb 12, 2020

• #9

SalemRule said:

I did not know that.

Although Nickel was a popular metal for electroplating in the past, I have never encountered any item machined from this metal.

Have you ?

Why is it seemingly never used ?

Click to expand...

Metals are rarely used pure. Canadian nickels over a decade or two old are the easiest example to find (for those of us in the US). A bunch of foreign coins have been pure nickel, but US nickels are only about 25% and have no magnetic attraction.

There are also magnetic bronzes. The only place I've ever encountered it is the knockoff nuts on the non-lugged wheels of old British cars (usually wire wheels). From that application I'd guess that it has high strength and good corrosion resistance, so it wouldn't surprise me if there were more applications on machinery.