New Chamber Reamer Problem

[ridgeway]

Got a new BRA reamer I spec'ed 6 months ago from a we known reamer maker. Opened it up to check it out...looks good except I can catch my fingernail on a really fine wire edge burr on each flute face. I did not contact maker, but I think deburring your part is the most basic thing that shouldn't be overlooked. I may just hand stone it before I use it. I'm sure first contact, it will dissappear, but not the point.

 

[Walt Krafft]

Send it back. Let them mess it up fixing it.

 

[jackieschmidt]

Could you post a close up picture.

I am in the machine shop business, and you are not supposed to have to do anything to new tools but use them.

 

[VA_XTC_Shooter]

Why not give reamer maker a chance to fix it?

 

[jackieschmidt]

Why not give reamer maker a chance to fix it?

He waited months.
Send it back with a note saying you want it back in no more than two weeks.

 

[DaveTooley]

All the above applies.
I'll add that I regularly stone the face of the flutes to remove micro chip weld. Knife edge stone bottomed out in the flute is how I do it.

Edit If you look at the edge under high magnification it appears to be very rough, coarse and serrated. It wouldn't surprise me to have the ground edge overhang the flute face slightly from the grinding process.

 

[AlNyhus]

Before using a new reamer, Stan Ware would rub the flutes with a real copper penny (pre 1982) to remove any sharp edges and then run the reamer into a test piece of barrel stub before cutting the first chamber with it.

Not sure if any of this applies to the OP's situation but there it is. -Al

 

[urbanrifleman]

Before using a new reamer, Stan Ware would rub the flutes with a real copper penny (pre 1982) to remove any sharp edges and then run the reamer into a test piece of barrel stub before cutting the first chamber with it.

Not sure if any of this applies to the OP's situation but there it is. -Al

That is what I do. I use a piece of bearing bronze.

 

[ridgeway]

Could you post a close up picture.

I am in the machine shop business, and you are not supposed to have to do anything to new tools but use them.

I can't really get a picture of it...is not really visible to eye...needs magnified. My fingernail catches it though. Would be hard to see it on a comparator...maybe a loop at a certain angle. I agree...a tool needs to be ready to go. I've re-ground many HSS endmills and always made sure they were burr free. Nothing surprises me these days...

 

[hogpatrol]

Before using a new reamer, Stan Ware would rub the flutes with a real copper penny (pre 1982) to remove any sharp edges and then run the reamer into a test piece of barrel stub before cutting the first chamber with it.

Not sure if any of this applies to the OP's situation but there it is. -Al

Back in the late '60s when I started making chips, the old timers taught me that deburring trick, only we used the coppers that went between jaws and the workpieces instead of pennies. I still do it.

 

[LVLAaron]

If I had to guess the maker I'd probably be correct... but I don't think it's a huge deal. If it's a new hss reamer, I cut a dummy chamber in something and then hone the back edge like Dave suggested, and then it's good to go.

 

[Alex Wheeler]

You know, if theres a burr or wire edge theres a possibility the tool made it past qc and final stoning and may not even be in spec. Id send it back just to be sure its in spec if for no other reason. Unless you have a way to measure it yourself.

 

[ridgeway]

That's a good point Alex.