How thick!

[Sea-Fever]

Could anyone enlighten me on an easy method to measure the thickness of the acrylic (if that’s what it’s made of) in my forehatch.

I can measure width and length obviously but I need to get an accurate measure for thickness before ordering some new stuff. I don’t really want to remove it prior to ordering if possible. The frame of the hatch prevents using a micrometer/ruler etc

I may be being a bit dense.

 

[awol]

Two blocks of wood, two straight edges , measure, subtract the thickness of the blocks.

 

[Clancy Moped]

Ask the manufacturer?

 

[earlybird]

Drill a small through hole, measure and then bung it up with a sealant or nut & bolt. You're replacing it after all.

 

[Martin_J]

Would it be silly to ask if there was a through bolted handle?

 

[Sea-Fever]

Would it be silly to ask if there was a through bolted handle?

Not silly but unfortunately no…it’s all in the frame.

 

[Sea-Fever]

Drill a small through hole, measure and then bung it up with a sealant or nut & bolt. You're replacing it after all.

Yep that’s possible…..it’s really suffering with UV crazing so no great loss.

 

[Sea-Fever]

Ask the manufacturer?

Long since gone to the big chandlery store in the sky I’m afraid.

 

[Sea-Fever]

Two blocks of wood, two straight edges , measure, subtract the thickness of the blocks.

Now you’re talking! Known thickness blocks and two straight edges…..only difficulty being I might need to rope my son into it….may cost me a packet of chocolate biscuits.

 

[Neeves]

Tim Tams have higher value

I'd say access a coating thickness meter - but unless you know and have good contacts with a galvaniser or professional paint shop - its nigh on impossible

Jonathan

 

[dutyhog]

Shine a light onto the window at 45° (a laser pointer would be best but not essential). Measure the distance along the window between the two brightest reflections.

For acrylic the thickness is 0.9 times the separation. Polycarbonate won’t differ much.

 

[pandos]

Drill a small through hole, measure and then bung it up with a sealant or nut & bolt. You're replacing it after all.

Exactly what I did on Wednesday night. My measurement using other methods were close but I was not convinced,

The hatches are original fitted on a 1980 HR352 and the polycarbonate is 12mm..

 

[Sea-Fever]

Shine a light onto the window at 45° (a laser pointer would be best but not essential). Measure the distance along the window between the two brightest reflections.

For acrylic the thickness is 0.9 times the separation. Polycarbonate won’t differ much.

Thanks…..I’ll give that some thought.

 

[Poignard]

I think two parallel wooden battens and a ruler as suggested by AWOL in post #2 is the simplest method but if you want a gadget to do it there are several available:


Transfer caliper