What is the thread designation for HBM force transducer G and G1 holes?

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SUMMARY

The discussion centers on the thread designation for G and G1 holes on an HBM 125kN force transducer. Both holes are specified as M33x2−4H with a depth of 35.6mm. The user expresses concern regarding the fine pitch of 2mm, questioning its compatibility with standard M33 threads, which typically have a coarse pitch of 3.5mm. The conversation highlights a lack of clarity from HBM's technical support regarding the thread specifications.

PREREQUISITES
  • Understanding of metric thread designations, specifically M33 threads.
  • Familiarity with fine and coarse pitch threading.
  • Knowledge of force transducer specifications and applications.
  • Basic comprehension of ISO Metric standards in engineering.
NEXT STEPS
  • Research ISO Metric Thread Standards, particularly ASME B1.13M.
  • Investigate the differences between fine and coarse pitch threads in metric systems.
  • Explore HBM force transducer specifications and compatibility with various attachments.
  • Learn about the engineering tools available for verifying thread compatibility.
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Engineers, mechanical designers, and technicians involved in the selection and installation of force transducers, particularly those working with HBM products and metric threading systems.

Mech King
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Afternoon everyone,

I am slightly confused...

Basically, i will be purchasing a force transducer from a company called HBM.

Now, on their data sheet it shows that there are two tapped holes either end of the transducer, designated by G and G1.

I am using a 125kN transducer, and for G and G1 it gives the following (also see attached screen shot and zoom into the bottom table):

G:M33x2−4H 35.6 deep.

G1:M33x2−4H 35.6 deep.

Now i understand what each number and letter is supposed to denote, but the pitch value of 2mm seems so small. If you notice on the table, all thread pitches are 2mm - even for the M16 to M72 threads that are listed in the table?

Obviously for a course pitch the the pitch for an M33 is 3.5mm, but the fine pitch series doesn't mention anything?

I don't want to purchase the load cell if it will be an impossiible task to get the thread on the attachments - that will screw into the M33 holes.

I also know that the HBM are originally a German company, so maybe they use an odd designation.

I have contacted the UK tech support team and they don't know.

Can anyone please help me?

Have a great weekend,

mech King


Genrally we tend to use ISO Metric Course threas in my industry
 

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Machinery's lists all of those as being part of the M profile as per ASME B1.13M. I can't say that I am familiar with them because I don't use metric threads very often. I don't even have the spec on hand to look at.