Kinex Try Square: help needed

[hemdale]

Hello everybody,

I needed a good try square for a long time... and I was looking for one that would also work to set up the fence / rail on my MFT (no, I didn't buy the million dollar Woodpecker MFT3 square  [unsure])

I have these two, and I have to return one of them. I've tried to check their accuracy and they are both pretty good. Some tiny details though... I would greatly appreciate if you could advise me which one to keep.

Kinex 4053-36. Base is 40mm wide. Thickness is 8mm.
Overall size: 410mm x 200mm. Precision: Class 2

Kinex 4055. Base is 32mm wide. Thickness is 8mm.
Overall size: 410mm x 250mm. Precision: Class 2

I know that a square would "keep" its precision over time and the bigger the square is, the more precise it is. Ok, maybe not put in those words but you know what I mean. The longer the try square is, the less deviation you have over the length.

However, One thing I don't know about is precision class. Is #2 better than #1 ?

The Kinex 4053-36 has laser engraved: DIN 875/2. 6/2015
The Kinex 4055 has written on it B400 STN 255103.Ou 1/2015

I'm guessing the 1st one is made in june, and the second in January.
Other than that, any thoughts regarding the DIN 875/2 or the B400 STN things ?

Thanks guys.

 

[cblanton42]

Classes start at 0 for the "standard" and 1-7 for calibrations when using weights so I assume precision ratings are the same.  Therefore I'd say #1 is better than #2 but not 100% sure.

Good luck,
CB

 

[Birdhunter]

Have you looked at the Woodpecker framing square? It is extremely accurate and useful for aligning more than just the MFT.

 

[hemdale]

@bird: would looove the woodpecker but soo bloody expensive

 

[GarryMartin]

DIN 875 and BS 939 are often quoted regarding accuracy of squares.

DIN 875/00 is roughly equivalent to BS 939(AA)
DIN 875/0 is roughly equivalent to BS 939(A)
DIN 875/1 is roughly equivalent to BS 939(B)

Not sure about DIN 875/2 equivalence to BS 939.

DIN 875/00 is the most accurate, reducing in accuracy through to DIN 875/2.

DIN 875/00 and 875/0 are lab quality instruments or used for checking the accuracy of other tools. The most you should ever need in a workshop is 875/1.

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