MadModder

Gallery, Projects and General => Neat Stuff => Topic started by: eskoilola on February 24, 2018, 10:08:15 AM

Title: Frankfurt flea market.... yet AGAIN !
Post by: eskoilola on February 24, 2018, 10:08:15 AM
Oh dear. I made it again.

Kebab, sunshine, VERY cold wind and carbide inserts.

Seems I just cannot help myself. About 100 inserts 50 cents a pop. I just grabbed two fistfuls from a insert pile the seller had. Ended up being the proud owner of some really odd bits.

Does anyone know what the inserts in the right are used for ?
(http://kirppuja.fi/Public/madmodder/IMG_4996_odd.jpg) (http://kirppuja.fi/Public/madmodder/IMG_4996.jpg)(http://kirppuja.fi/Public/madmodder/IMG_5003_odd.jpg) (http://kirppuja.fi/Public/madmodder/IMG_5003.jpg)
(http://kirppuja.fi/Public/madmodder/IMG_4995_small.jpg) (http://kirppuja.fi/Public/madmodder/IMG_4995.jpg)(http://kirppuja.fi/Public/madmodder/IMG_4996_small.jpg) (http://kirppuja.fi/Public/madmodder/IMG_4996.jpg)(http://kirppuja.fi/Public/madmodder/IMG_4997_small.jpg) (http://kirppuja.fi/Public/madmodder/IMG_4997.jpg)
(http://kirppuja.fi/Public/madmodder/IMG_4998_small.jpg) (http://kirppuja.fi/Public/madmodder/IMG_4998.jpg)(http://kirppuja.fi/Public/madmodder/IMG_4999_small.jpg) (http://kirppuja.fi/Public/madmodder/IMG_4999.jpg)(http://kirppuja.fi/Public/madmodder/IMG_5000_small.jpg) (http://kirppuja.fi/Public/madmodder/IMG_5000.jpg)
(http://kirppuja.fi/Public/madmodder/IMG_5001_small.jpg) (http://kirppuja.fi/Public/madmodder/IMG_5001.jpg)(http://kirppuja.fi/Public/madmodder/IMG_5002_small.jpg) (http://kirppuja.fi/Public/madmodder/IMG_5002.jpg)(http://kirppuja.fi/Public/madmodder/IMG_5003_small.jpg) (http://kirppuja.fi/Public/madmodder/IMG_5003.jpg)
(http://kirppuja.fi/Public/madmodder/IMG_5004_small.jpg) (http://kirppuja.fi/Public/madmodder/IMG_5004.jpg)(http://kirppuja.fi/Public/madmodder/IMG_5005_small.jpg) (http://kirppuja.fi/Public/madmodder/IMG_5005.jpg)(http://kirppuja.fi/Public/madmodder/IMG_5006_small.jpg) (http://kirppuja.fi/Public/madmodder/IMG_5006.jpg)


Title: Re: Frankfurt flea market.... yet AGAIN !
Post by: PekkaNF on February 24, 2018, 12:20:56 PM
This is interesting:
(http://kirppuja.fi/Public/madmodder/IMG_4996_small.jpg)

Could it be to make multirib belt wheels?

Angle looks more acute than normal 60 degrees for threading. Polyvee has 40 degrees of included angle.
https://cdn.shopify.com/s/files/1/0371/7109/files/poly-v-belt-pulley.pdf?7462402128406206542

Does look a little like this:
http://www.pulse-pr.co.uk/ntk-demonstrates-pulling-power-with-poly-v-line-382.asp

If the "pitch" is 2,34 mm i.e. for J-belt....do you want to sell some?

Pekka
Title: Re: Frankfurt flea market.... yet AGAIN !
Post by: philf on February 24, 2018, 02:33:02 PM
I just measured the angle by copying and pasting the image into Autocad and, as Pekka says, they could well be for poly-v pulley machining as they do seem to be 40 degree.

What is the pitch?

Phil.
Title: Re: Frankfurt flea market.... yet AGAIN !
Post by: tom osselton on February 24, 2018, 04:05:38 PM
Nice haul!
On a side note I notice on my old samsung tablet there are 3 colums of pics but only shows two rows on the page
Title: Re: Frankfurt flea market.... yet AGAIN !
Post by: eskoilola on February 24, 2018, 08:07:27 PM
On the side one can read: N-40. NTK
The N-40 is probably the material - so not much of information there.
The distance over 2 teeth is about 7 millimeters, measured with my bad sight and a Mitutoyo caliper. That would make the pitch 3.5 millimeters.
(http://kirppuja.fi/Public/madmodder/IMG_5007.JPG)
(http://kirppuja.fi/Public/madmodder/IMG_5008.JPG)
Title: Re: Frankfurt flea market.... yet AGAIN !
Post by: eskoilola on February 24, 2018, 08:22:07 PM
NTK POLY-V
Title: Re: Frankfurt flea market.... yet AGAIN !
Post by: philf on February 25, 2018, 03:57:24 AM
PK size Poly-V is nominally 3.56mm pitch and I'm fairly sure that the 40 in the part number is for 40 degrees.

Phil.