Speed Increasers for Lathes and Swiss Machines – Unlocking High-RPM Capability for Small Tools

by Bernard Martin

Axial Live Tool Speeder

High-speed milling and drilling on a lathe or Swiss machine usually hits a ceiling long before the process wants to. Small tools need surface speed to cut cleanly, form a real chip, and hold size. Live tooling often runs out of RPM first.

That is the job speed increasers are built for. The current product news highlights Heimatec speed increasers available through Platinum Tooling for both Swiss-style machines and live-tool lathes.

Speed increasers, "speeders", mechanically multiply spindle RPM through a compact internal gear train. Typical ratios range from 3:1 up to 6:1, taking a 6,000 RPM live tool output and turning it into 18,000–36,000 RPM at the cutter. The gain is rotational speed, not additional horsepower, which makes these units a natural fit for small-diameter tools where surface footage matters more than torque.

On lathes and Swiss-style machines, this becomes especially useful for cross drilling, engraving, light milling, chamfering, and fine finishing. Tools under 6 mm or ¼"  often struggle to reach recommended cutting speeds through standard live tooling. A speeder allows those tools to run in a more stable cutting range, reducing rubbing, improving chip formation, and extending tool life.

Today's speed increasers are designed to integrate directly into common live tool interfaces, including BMT, VDI, and gang-tool Swiss platforms. Installation mirrors standard driven tooling, with no machine modification required. Once mounted, the speeder operates as a passive mechanical device, driven entirely by the machine’s live spindle. No additional power, wiring, or control integration is required.

Coolant delivery is a key part of current designs. Internal coolant channels route flow directly through the speeder to the cutting edge, supporting chip evacuation and temperature control at elevated speeds. This is especially important in Swiss applications where chip control directly affects cycle reliability and unattended run time.

Accuracy and balance matter at higher RPM. Speed increasers are built with precision ground gears, hardened components, and preloaded bearings to maintain concentricity under continuous use. Proper balance minimizes vibration, which protects both the tool and the machine’s live spindle bearings. For engraving and micro-milling work, this stability shows up immediately in surface finish and edge definition.

Radial LIve Tool Speeder

From a productivity standpoint, speed increasers often eliminate secondary operations. Features that once required a mill or a secondary setup can be completed in the same turning cycle. That reduces part handling, simplifies scheduling, and shortens overall cycle time without changing the machine platform already on the floor.

Speed increasers do not replace high-torque live tools for heavy milling. They fill a different role, one focused on precision, surface speed, and light material engagement. Used in that window, they become a straightforward way to expand the capability of a lathe or Swiss machine without adding complexity.

For shops using small tools on turning platforms, speed increasers offer a mechanical solution to a very practical problem: getting the cutter into its proper cutting range and keeping it there consistently.

Availability is also a big thing for most shops. Platinum Tooling maintains in-stock speeders aimed at common Swiss platforms from Citizen, Tsugami, and Star, along with in-stock options for BMT turret lathes from brands such as Nakamura, Miyano, DN Solutions, and Haas, with additional models available from factory inventory on short lead times.

To learn how speed increasers can be applied to specific lathe or Swiss applications, connect with the Next Generation Tooling team for technical guidance and product selection support.