Drive-gear

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Drive-gears to be used in direct drive and some other extruders (like the Adrian's_Geared_Extruder).

Model From Length Outer diam. Hob diam. Bore Approximate Cost Additional notes
Makerbot MK7 US 11 mm 12,5 mm 10,65 mm 5 mm 12 $ Makerbot drive-gear.jpg
Mendel-parts Netherlands  ? mm  ? mm  ? mm 5,1 mm 14 € Mendel-parts drive-gear v2.jpg stainless steel (the drive-gear mentioned in the blog is a little different) Mendel-parts drive-gear supposed-v2.jpg
Mendel-parts drive-gear v1.jpg previous version was brass
QU-BD US 11.03 mm 11.64 mm 10.5 mm 5 mm 7,50 $ Qubd drive-gear.jpg Brass alloy. (maybe better suited for 3mm than 1,75mm)
RepRapWorld Netherlands 10 mm 12 mm  ? mm 5 mm 8 € Reprapworld drive-gear.jpg "mk7 compatible"
Mini-hyena Hungary 13 mm 8 mm
11 mm
11 mm
13 mm
6 mm
9 mm
9 mm
11 mm
5 mm
5 mm
8 mm
8 mm
12 $ Mini-hyena 5x8.jpg Mini-hyena 5x11.jpg made by Arcol !
Brass insert
Conrad.com
Conrad-uk
EU
UK
 ? mm  ? mm  ? mm M4 3 €
4 £
-
Maritime-models UK  ? mm  ? mm  ? mm many 1,80 £ Maritime-models drive-gear.jpg need some use to grip more effectively Maritime-models drive-gear close-up.jpg
Paoparts France 15 mm  ? mm 8 mm M4 5.30 € Molette.jpg
Reprapworld Netherlands  ? mm  ? mm  ? mm M4 4 € -

There is also Blddk who make some drive-gear similar to the makerbot-mk7, you may ask him on the IRC.