How to Use a Pin Vise for Miniature Magnetization
A pin vise is the essential tool for drilling magnet holes in miniatures. This guide covers everything from selecting the right drill bit to drilling clean, accurate holes every time.
Step 1: Select the Right Drill Bit
Match your drill bit diameter to your magnet diameter exactly. If you're using 3mm x 2mm magnets, use a 3mm drill bit. The magnet should press-fit into the hole snugly without needing to be forced.
Common sizes for miniature magnetization:
- 2mm bit — for 2mm x 1mm magnets (small arms, light weapons)
- 3mm bit — for 3mm x 2mm magnets (standard weapon swaps, infantry joints)
- 5mm bit — for 5mm x 2mm magnets (vehicle turrets, large weapon mounts)
- 6mm bit — for 6mm x 2mm magnets (heavy vehicle components, dreadnought arms)
Step 2: Secure the Bit in the Pin Vise
Loosen the collet by twisting the nose of the pin vise counterclockwise. Insert the drill bit so that roughly 5-8mm of the bit extends past the collet. Tighten firmly by twisting clockwise. Give the bit a gentle tug to confirm it's seated — a loose bit will wobble and ruin your hole.
Step 3: Mark Your Drill Point
Before drilling, mark the exact center of where your hole needs to go. Use a hobby knife tip or a pushpin to press a small divot into the plastic. This starter hole prevents the drill bit from wandering when you begin.
For symmetrical joints (like shoulder sockets), measure from two reference edges to ensure the hole is centered. A hole that's off-center means a magnet that doesn't align with its partner.
Step 4: Drill the Hole
Place the drill bit tip into your marked divot. Hold the pin vise like a screwdriver with your index finger resting on the top of the handle. Apply light, steady downward pressure and twist the handle clockwise with your other hand.
Key technique points:
- Let the bit do the work. Light pressure and consistent rotation cuts cleaner than forcing the bit down hard.
- Lift the bit periodically. Every few rotations, pull the bit up slightly to clear plastic shavings from the hole. Packed shavings increase friction and can crack thin walls.
- Keep the bit perpendicular. A tilted hole means a tilted magnet, which weakens the connection and looks wrong.
Step 5: Control Your Depth
Drill depth should match your magnet thickness. For a 2mm thick magnet, drill approximately 2mm deep — or slightly deeper if you're using super glue (the glue adds a thin layer under the magnet).
To gauge depth, you can wrap a small piece of tape around the drill bit at the target depth as a visual stop indicator. Check depth frequently by test-fitting the magnet dry (no glue) in the hole.
The magnet should sit flush with the surface or very slightly recessed. A magnet that protrudes will create a gap between parts.
Common Mistakes and How to Avoid Them
Using the Wrong Bit Size
A bit that's too small means you'll force the magnet in and risk cracking the plastic. A bit that's too large means the magnet rattles around and won't hold position while the glue cures. Measure your magnets and match the bit exactly.
Drilling Too Fast or With Too Much Pressure
Forcing the pin vise generates heat and can melt or deform the plastic around the hole. If you feel significant resistance, back the bit out, clear the shavings, and continue with less pressure.
Not Clearing Shavings
Plastic shavings pack into the hole as you drill. This makes the hole shallower than you think and creates an uneven bottom surface. Lift the bit out every 3-4 rotations to clear debris.
Drilling Through the Other Side
On thin parts, it's easy to punch through. Use the tape depth marker and check progress frequently. If the plastic is very thin, consider using a thinner magnet or surface-mounting instead of recessing.
Forgetting to Mark Center
Starting without a guide divot almost always results in the bit walking to one side. Take the two seconds to press a starter mark.
Recommended Pin Vise
A comfortable, ergonomic handle makes a significant difference when you're drilling dozens of holes in a session. A good pin vise should have a swiveling top cap for smooth rotation and a cushioned grip to prevent hand fatigue.
[Buy Product=large-pin-vise-0-5mm-8mm,variant=All]Get Everything You Need in One Kit
The Magnetization Starter Pack includes a pin vise, drill bits sized for our most popular magnets, magnets, Magnicators, and super glue.
[Buy Product=magnetization-starter-pack,variant=All]