Need the size / dimensions of the MK7 drive gear

Hello togehter,
i didn't found the size / dimension of the MK7 drive gear in the net.
Need it to make it myself.

It would be nice when somebody have it.

Regards

Edited 1 time(s). Last edit at 04/23/2012 05:34PM by penny2009.

The effective diameter is on the makerbot site [store.makerbot.com].

I was about to buy one to upgrade my gen9 extruder but the shipping estimate is $40 from makerbot. Is there anywhere to buy them in the UK or europe? If a few people were interested in the uk i'd be willing to split the postage.

Pete

So what are the dimensions? The Makerbot site only gives the OD. I'd like the ID (shaft size as well), the length, the position of the toothed area, etc. That is, enough data to know if I can use it or not. I'd like this info for the Mk5 drive gear, the Mk6 drive gear (may be same), the Mk7 drive gear, and any other related toothed extruder gears they make. Options from other makers would be welcome as well.

I have tried to contact Makerbot, but they seem to be totally unresponsive.

Thanks for any help here.

MakerBot MK7:
    Length: 11mm
    Outer Diameter: 12.5mm
    Hob Diameter: 10.65mm (Smallest diameter at the tops of the teeth).
    Hob Center: 7.45mm (Measured on the lock-screw end of the wheel).
    Bore: 5mm

Arcol 11x5:
    Length: 13mm
    Outer Diameter: 11mm
    Hob Diameter: 9.1mm (Smallest diameter at the tops of the teeth).
    Hob Center: 9mm(Measured on the lock-screw end of the wheel).
    Bore: 5mm

[www.thingiverse.com]

Similar design.