Instrument to check Internal Bottled Deep Bore Diameter

  • Thread starter SHIVAPRASAD N S
  • Start date
S

SHIVAPRASAD N S

#1
Dear Friends,

I am in need of an instrument which can check deep bore diameter which is having a profile of bottled neck.
Please look in to attachment for schematic drawing of the part to be checked.
 

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U

Umang Vidyarthi

#2
Re: Need Instrument to check Internal Botteled Bore Diameter

You may use 'Translating caliper'. It is shaped like a scissor and the ID of the bore is translated at the outer end.

You may look up Robert Sorby's site to see the pictures. These are available from Indian manufacturers too. Just google for your area.

Hope this helps

Umang :D
 
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S

SHIVAPRASAD N S

#3
Re: Need Instrument to check Internal Botteled Bore Diameter

Dear Mr. umang Vidyarthi,:agree:

Thaks for your reply. The instrument you propse is for smaller length bores.
Pl go thorugh the attachment for the drawing (it is in my earlier post), I need to check at the depth of about 250mm & the length of bore is over 1950mm.
This instrument does not support my requirement.
 
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U

Umang Vidyarthi

#4
Re: Need Instrument to check Internal Botteled Bore Diameter

Dear Mr. umang Vidyarthi,:agree:

Thaks for your reply. The instrument you propse is for smaller length bores.
Pl go thorugh the attachment for the drawing (it is in my earlier post), I need to check at the depth of about 250mm & the length of bore is over 1950mm.
This instrument does not support my requirement.
I have used 'Translating calipers' for much longer bores during boring operation on boring machines. You need to check only 250 mm, which means the fulcrum will be at 150mm max. I have suggested this as an economical option. Another (expensive) option is to use 'Telescopic dial bore gauge'.

Hope this helps.

Umang :D
 
S

SHIVAPRASAD N S

#5
Re: Need Instrument to check Internal Bottled Bore Diameter

Dear Umang,

YOu have again mistaken. If you see the attachment where in I have posted a skimatic diagram of the component you will understand. It is not 250 mm that I have to check. My bottled bore starts from 250mm depth & the length of the bore is about 1950 mm.

I can not insert bore gauge because for the first 250 mm lenght bore diameter is less. I have to check higher bore diamenter after that. Tolerance is 0.4mm.

Have any solution?


Shiva :bonk:
 

Jim Wynne

Staff member
Admin
#6
Re: Need Instrument to check Internal Bottled Bore Diameter

Dear Umang,

YOu have again mistaken. If you see the attachment where in I have posted a skimatic diagram of the component you will understand. It is not 250 mm that I have to check. My bottled bore starts from 250mm depth & the length of the bore is about 1950 mm.

I can not insert bore gauge because for the first 250 mm lenght bore diameter is less. I have to check higher bore diamenter after that. Tolerance is 0.4mm.

Have any solution?


Shiva :bonk:
You're going to have a tough time measuring that unless you're willing to sacrifice some parts. One option might be to calculate the diameter based on the length and volume of the cylinder, but I don't know if that method will be precise enough.
 
T

True Position

#7
Re: Need Instrument to check Internal Bottled Bore Diameter

A CMM with a disc shaped probe would work but is obviously not the most cost effective option. Also, if you could somehow make a probe that would first fit into the part an air gage would work depending on the surface finish.
 
U

Umang Vidyarthi

#8
Re: Need Instrument to check Internal Bottled Bore Diameter

Dear Umang,

YOu have again mistaken. If you see the attachment where in I have posted a skimatic diagram of the component you will understand. It is not 250 mm that I have to check. My bottled bore starts from 250mm depth & the length of the bore is about 1950 mm.

I can not insert bore gauge because for the first 250 mm lenght bore diameter is less. I have to check higher bore diamenter after that. Tolerance is 0.4mm.

Have any solution?

Shiva :bonk:
Do not get frustrated Shiva. If there is a problem-there always is a solution. Have a second look with an open mind, and don't forget that 'Minds, like parachutes, work only when open'.

I reiterate at the cost of repitition, that 'Translating calipers' are the ideal and cheaper solutions. I have used them plenty of times, length of the bore not withstanding. For longer jobs you may make the caliper using alluminium alloy to make it light weight. If you need one meter to go inside the bore, you mae use only 1/2 or 1/4th Length above the fulcrum, outside the bore.

2. Have you tried using the second option of 'Telescopic dial gauge'? You may keep adding the rods to reach the desired depth.

3. You may also try contactless gauges (very expensive). The nozzles at both end expels air at high pressure which rebounds from the surface-to be- measured, impulses read by the instrument, which translate it into the exact measurement with accuracy in milli-inches! I have used these instruments long back in 'Indian Railways' around seventies. At that time these were imported from Japan, you may google for their availability in your area.

4. There are many more types of contactless measuring devices, using laser and other techniques. You may search google.

Umang :D
 
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