Question for the ISO guys

P. Waller

Brass
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Received this old drawing this morning to quote the parts, it includes a few symbols that I am unfamiliar with. This is a photo of the drawing sent by the customer so the explination may be on the drawing yet not in the picture as taken.
There is a 42 MM thread 12 MM long then an undercut 3 MM wide up to a 44 MM diameter. After the undercut there are dotted dimension lines labeled 1 and 3, I do not see any features that they apply to.
2 of the inside surfaces have three triangles attached to them which I suspect is a surface finish callout. The dimensions circled in blue are the changes that are needed, the 3MM diameter becomes 7 MM and the 4 MM diameter becomes 9 MM
 
I don’t know how you hold the 23mm, 6mm, 22mm & 5mm if the 3mm & 4mm are changing to 7mm & 9mm.

Regarding the 1mm & 3mm:

Total guess...but is it a knurled feature centered on that 5mm wide shoulder? Or locations for flats used for wrenching the nozzle during assembly?

Edit: assuming the angle must remain constant.

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Looks like our filler nozzles down the soap plant . I believe you are correct on the surface finish triangles P . I'll check the GTD book in an hour so when I get into work . I also agree you're going to lose the length of the 23mm when you open up the bores . The engineer most likely missed this when he made the revision . Looks like they are going to improve their flow capabilities .

An O ring seal most likely fits in the undercut and the finish marks tend to tell me they don't want bacteria growing in a poor finish , that IS if this indeed is a filler nozzle .
 
Last edited:
I don’t know how you hold the 23mm, 6mm, 22mm & 5mm if the 3mm & 4mm are changing to 7mm & 9mm.

Regarding the 1mm & 3mm:

Total guess...but is it a knurled feature centered on that 5mm wide shoulder? Or locations for flats used for wrenching the nozzle during assembly?


Sent from my iPhone using Tapatalk

Not a modifaction, new parts from nylon, I am not looking forward to this chip nightmare.

These are injection nozzles for the food manufacturing industry, they want a larger small end, the 3 MM bore becomes 7 MM..

You did however answer the other question, we have samples of several other parts from the same manufacturer that have wrench flats milled on them, this now makes sense. Thank you very much. As I mentioned we did not receive the entire drawing.
 
Yep , look at my edit above . Food grade . ;)
 
Looks like our filler nozzles down the soap plant . I believe you are correct on the surface finish triangles P . I'll check the GTD book in an hour so when I get into work . I also agree you're going to lose the length of the 23mm when you open up the bores . The engineer most likely missed this when he made the revision . Looks like they are going to improve their flow capabilities .

An O ring seal most likely fits in the undercut and the finish marks tend to tell me they don't want bacteria growing in a poor finish , that IS if this indeed is a filler nozzle .
Thanks, these eject product onto stuffed pretzels so I am not terribly concerned about the overall geometry only about the fit into the existing machines, the thread and any other features that will effect this.
 
If barstock would fit thru your cnc spindle bore it would be a fairly easy job . Stringy chips yes , but easy on the tools . The only important dimensions I see that would make a difference would be from the thread shoulder to the nozzle end for stack height .

So ………………..maybe we the consumer will be getting MORE of whatever they are stuffing into these pretels ?? :encourage:
 
If barstock would fit thru your cnc spindle bore it would be a fairly easy job . Stringy chips yes , but easy on the tools . The only important dimensions I see that would make a difference would be from the thread shoulder to the nozzle end for stack height .

So ………………..maybe we the consumer will be getting MORE of whatever they are stuffing into these pretels ?? :encourage:
2 1/16 thru spindle machine so not a problem there, the chips will be a nightmare I suspect. The set up and programming is simple, I could bang out hundreds of these per day in POM but nylon will surely prove troublesome from the added joy of unbreakable chips in the bore, may have to hand program a bunch of feed dwells to break them which will be a good deal of finger CAD on a 25 year old machine, you have to do what you have to do however (-:
 
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