I see that the 51L stainless steel latches are stronger then the V951L stainless latches?

  • English
  • Français
  • Nederlands
  • Español
  • Deutsch
  • Português

They are not stronger and have same mechanical properties.

This is the feedback from the manufacturing plant

I can only give my best guess for the BF-made parts which is this: From the real forces where the parts break they added a safety margin (which is a little less big for the stainless version but still big enough)

the max. forces mentioned in the new catalog (for both materials) are now mentioned to avoid confusion.

The suffixes differ from part number to part number.

BF is indeed an old suffix, it stands also for stainless steel.  However has been almost changed for all the series, so you’ll still find the BF on some of the parts, such as V18L01-1X1BF

BP is the most common suffix though to say that the parts are stainless steel.

There exists also CP , that one is different since that is stainless steel A4 quality (higher corrosion resistant)

 

Regarding the strength issue.

Yes: you are correct the stainless steel parts have less strength then the steel zinc plated version.

This could be caused by the drawhook that is less strong, but is not the case.  See picture below

Part number 51L1-1X1BF is and old part number and I know that they are nowadays difficult to get, due to tool wear.

 

Below you’ll see the old drawing of 51L1-1X1BF and new drawing of V951L04-1X1BP

I do not have the impression that the thickness of the drawhook has been modified, which would cause to have a weaker part.

 

camloc drawhook

camloc drawhook

My assumption is that the notes came afterwards.  Over time more tests have been carried out and more safety margins have been integrated, which explains the reduced force recommendations.

Another assumption is that I do think that the old catalog that dates from more then 50 years ago, was not that accurate.

 

What helps me also is the knowledge that the parts have been made interchangeable,

The only thing that can be different is the mix of material (a slightly different alloy, but that would not explain that big difference)

The BP version, most components, are made from 1.4301 which is V2A quality

camloc drawhook old new

camloc drawhook old new

 

 

 

Tags: