How to choose a rotary tool for engraving and detail work
A rotary tool is the all-round handpiece for engraving, grinding, milling, cutting and polishing. This guide shows how to pick the right one by speed range, collet size and accessories.
View rotary toolsWhy does the speed range matter most?
Speed decides how cleanly and material-appropriately a rotary tool works. Good units offer stepless control from about 5,000 to 35,000 rpm, so soft materials do not melt and hard ones do not chip.
Plastic, wax and soft metals call for low speed to avoid heat. Cutting steel or engraving glass and carbide instead needs high speed and steady torque reserves under load.
- Low (5,000‑10,000 rpm): plastic, wax, polishing, delicate materials.
- Medium (10,000‑20,000 rpm): wood, aluminium, drilling, grinding.
- High (20,000‑35,000 rpm): cutting steel, engraving glass and carbide, milling.
Which collet size do I need?
The collet grips the shank of the accessory. Only when the shank diameter matches the collet exactly does the tool run true and vibration-free. Common sizes are 2.35 mm and 3.2 mm, with 6 mm on more powerful units.
Which accessories suit engraving and detail work?
A rotary tool is only as versatile as its accessories. For engraving you use diamond and carbide tips, for grinding abrasive stones and flap wheels, for cutting thin cut-off wheels, and for polishing felt and cloth heads.
- Engraving: diamond tips for glass and ceramic, carbide burrs for metal.
- Grinding and deburring: grinding stones, sanding bands, brushes.
- Cutting: reinforced cut-off wheels for metal and plastic.
- Polishing: felt wheels with polishing paste for a high gloss.
- Flexible shaft for fine work, drill stand for accurate drilling.
For long sessions, weight and ergonomics also count. A slim, well-balanced handpiece is less tiring, and a flexible shaft relieves the hand during the finest engraving.
Frequently asked questions
What speed do I need for engraving?
Engraving glass or carbide works best at high speeds of 20,000 to 35,000 rpm. Softer materials such as plastic need lower speeds to avoid melting.
Which collet size is standard?
2.35 mm and 3.2 mm are the most common. The shank diameter of the accessory must match the collet exactly, otherwise it runs off-centre. A set with several sizes is the most flexible.
Corded or cordless?
Corded tools deliver constant power for continuous work, while cordless models offer mobility. For fine, high-load work over long periods a corded tool with constant electronics is usually the better choice.
What is a flexible shaft for?
The flexible shaft transfers the motor rotation to a slim handpiece. This lets you engrave and grind more precisely and with less fatigue because the motor weight is not in your hand.
Looking for the right rotary tool?
We supply rotary tools with stepless speed, constant electronics and matching accessories for engraving and detail work.
Fine speed control
Stepless from 5,000 to 35,000 rpm.
Full accessory range
Burrs, grinding stones and cut-off wheels to match.
Precise chucking
Collets for true-running accessories.
Expert advice
Our team helps you choose.