Model Engine Maker

Supporting => Tooling & Machines => Topic started by: steamer on January 11, 2019, 09:47:36 PM

Title: Interesting bottom tap
Post by: steamer on January 11, 2019, 09:47:36 PM
Ordered up a new bottom tap for the Wallaby...from Travers tool.    It got delivered today.   Great!    Took it out of the package and tried to start it in a 1/2-20 hole, and not even close to starting...I say hmmmm, my taper tap is old and hand resharpened, I'll got down the road and get a new taper and plug tap.   

The local supplier was cheaper than the Travers web store, and with what turned out to be far better quality.   When I got back, I put the plug tap in, no problem.    I then tried the new Travers tool bottom tap...NO GO.    hmmmmm  Why does it look bigger than the the other two?

I read the label etched on the side of the tap.   1/2-20 H3 4fl  Btm.    The plastic package is marked that as well...  OK....then I measure it.   It measures 0.562"   ! :hammerbash: :zap:...more like 9/16-20!

I'm buying my taps local from now on if at all possible!!!

Travers is going to give me a refund....I'll let you know how that works out..


Dave
Title: Re: Interesting bottom tap
Post by: Neil-Lickfold on January 11, 2019, 10:34:42 PM
I really needed a good laugh today and you provided it.
H3 taps are a very good  tolerance range too.
I have never had issues with the Travers company, but clearly something was not right.
Oneday that 9/16 20 tap will come in handy.
If you decide not to want to keep it, I will be happy to buy it off you.
I have a need to a similar thread size and pitch  range. Was looking at M14 X 1.25mm pitch
but 9/16-20 will work just as well.
PM me for my address details and I can PayPal you for it.
Neil Lickfold
Title: Re: Interesting bottom tap
Post by: b.lindsey on January 11, 2019, 11:03:15 PM
Well that sucks, just a case of misidentification I suppose. Travers is a reputable company though and should make it good with no hassle. 

Bill
Title: Re: Interesting bottom tap
Post by: steamer on January 11, 2019, 11:08:22 PM
I really needed a good laugh today and you provided it.
H3 taps are a very good  tolerance range too.
I have never had issues with the Travers company, but clearly something was not right.
Oneday that 9/16 20 tap will come in handy.
If you decide not to want to keep it, I will be happy to buy it off you.
I have a need to a similar thread size and pitch  range. Was looking at M14 X 1.25mm pitch
but 9/16-20 will work just as well.
PM me for my address details and I can PayPal you for it.
Neil Lickfold

Yeah I'm sitting here moiling that one over my self.   I have a big selection of taps, but not a 9/16-20....so I may keep it after all...after I relabel it!!!

Dave

Title: Re: Interesting bottom tap
Post by: kvom on January 12, 2019, 11:55:46 AM
I usually get my bottom taps by grinding off the tip of a plug tap.   :naughty:
Title: Re: Interesting bottom tap
Post by: BillTodd on January 12, 2019, 02:01:35 PM
Could be for plated or anodised threads.
Title: Re: Interesting bottom tap
Post by: dieselpilot on January 13, 2019, 03:59:35 PM
What make is the tap? Doesn't Traverse just sell them? Recently I saw a post someone got a tap that had right hand threads, but left hand cutting geometry.
Title: Re: Interesting bottom tap
Post by: steamer on January 13, 2019, 04:16:07 PM
What make is the tap? Doesn't Traverse just sell them? Recently I saw a post someone got a tap that had right hand threads, but left hand cutting geometry.

Regal cutting tools out of the US.

Dave
Title: Re: Interesting bottom tap
Post by: dieselpilot on January 13, 2019, 04:29:55 PM
Mistakes happen.