Specific tool for removing tiny parts from sprues?

[Quaestor]

What do you use for removing something miniscule, like a 1/700 Flyhawk or Yamashita Hobby part, from the sprue without breakage?

[wefalck]

Cutting tools exert wedging forces, which can lead to damage on materials or parts. Hence, we use sharp and narrow tools such as skalpels, one option in this case.

Parts on a sprue means that on one side of the cut there is a 'good' side that needs to be protected, while the other side of the cut would be 'waste', i.e. the sprue. Hence, one can or should use a tool that has an assymetric cutting edge, so that the wedging forces only act on the waste side.

There seem to be various cutting pliers with such a configuration on the market.

Personally, I am using so-called 'cutting tweezers' as used by watchmakers to shorten watch springs:


Random picture from the Internet for illustration only

The assymetric cutting head allows one to access also tight spaces, say between neigbouring parts on a sprue. They are not cheap, but when treating them carefully, should last a life-time.

These tweezers are also good for nipping something off flush on a surface.

[InchHigh]

Look for "God Hand" sprue cutters, Amazon lists several versions. Expensive, but a pleasure to use.

[Quaestor]

Danke Eberhard, for the explanation of good and bad sides. I've seen cutters like the one pictured, on the web, could not imagine how they were held and used.

Jeff, thanks for the specific tip. Noticed "God hand" online, I'll take another look.

Much appreciated

[Admhawk]

A little on the pricey side, but an ultrasonic cutter does a fantastic job of cutting through thin plastic and resin without any stresses applied.

Several models can be found on Amazon for $300 to $400.

[Quaestor]

A little on the pricey side ... $300 to $400.

Maybe if I was 50 years younger and planned to use it for quite a while.
Thanks, made my day.

Just received the Flyhawk DKM type 35 torpedo boat double kit and yikes, I really need a God hand before I get deeply into it.

[Quaestor]

Update:

I bought the basic, lowest price (USD 15) God Hand nipper; it arrived today.
Just experimented with it on the full hull parts, which I won't use, of the Flyhawk DKM Type 35s.

Holy moley

How have I lived without this thing?
The slightest pressure cuts through polystyrene like a hot knife through butter. No sound, no energy transfer to send the part to the carpet monster.
Tiny propellers came off the sprue so cleanly they might need just a little emery board on each blade, if that.
Thin prop shafts did not break (!) and need a bit more cleanup because I didn't try to cut super-close to the part.
Practice will improve even this result.

$15 well spent.