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Parametric Magnetic Driver Bit Handle

by JoeyC, published

Parametric Magnetic Driver Bit Handle by JoeyC Nov 18, 2012

Featured Thing!

Description

Fully configurable magnetic handle for 1/4" driver bits.

I couldn't find a handle I liked for some metric driver bits I had gotten. So I designed this one.

It uses an 8mm magnet to hold the bits in place, and is easy to change to suit your preferances.

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Awesome!  I have a set of drill bits with 1/4" bases.  I use them to clean/dress holes.  This is what I need!

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Instructions

1) Print.

2) Glue 8mm magnet into handle.

3) Screw (or unscrew) something!

Notes:

The OpenSCAD file is easy to change. The varibles defined at the top of the file configure the handle. You can change the handle diameter and length, the shape/size of the finger grips, and the size of the magnet used.

Also the bit size is changable to adjust for a tight fit on your printer, or to use different size bits. Note that the hex hole for the bits is draw using a six sided circle so the bit diameter will not match the bit size. A bit of trail and error is needed.

The variables are as follows (all dimensions in mm):

MagDia: Magnet hole diameter, adjust as needed to get a good fit with your magnet. The magnet needs to slide into the handle so don't make it too tight.

BitDia: Driver bit hole diameter, adjust as needed to get a good fit with your setup.

BitDth: Depth of hole for bit

HandDia: Outer diameter of the handle HandLen: Handle length

VertDia: Diameter cylinder used to cut out vertical grip slots.

VertOff: Offset of vertical slots from outer edge, larger numbers mean a shallower slot.

GripDia: Diameter of circle used to creat the grip depression near the end of the handle.

GripDth: Depth of finger grip.

GripRatioTop: Height to width ratio of oval used to cut the top half of the finger grip.

GripRatioBot: Height to width ratio of oval used to cut the bottom half of the finger grip.

GripOff: Offset from bottom of the handle to the finger grip.

Awesome!  I have a set of drill bits with 1/4" bases.  I use them to clean/dress holes.  This is what I need!
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