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Gerardi Spindle Speeders

For Increased Spindle Speeds up to 35,000RPM!

ER16, 1:8 Ratio, 35,000RPM
Gerardi Spindle Speeder

ER20, 1:6 Ratio, 22,000RPM
Gerardi Spindle Speeder

ER25, 1:6 Ratio, 15,000RPM
Gerardi Spindle Speeder

ER32, 1:6 Ratio, 12,000RPM
Gerardi Spindle Speeder

ER40, 1:4.2 Ratio, 10,000RPM
Gerardi Spindle Speeder

ER50, 1:4 Ratio, 8,000RPM
Gerardi Spindle Speeder

Italian made. High accuracy. High reliability.

Gerardi spindle speeders have been designed to offer maximum reliability and accuracy in high speed light milling and drilling operations. Throughout the design and manufacturing process, these spindle speeders utilise the most advanced technology and Gerardi's unbeatable technical knowledge in providing complex engineering solutions.


The spindle speeders series can be mounted on traditional machines and on machines with automatic tool change. With a range of RPM ratio's and ER collet sizes, they can be used for high speed milling up to 35,000RPM (1:8 ratio) or increasing low speed machines for larger diameter tools (1:4 ratio).


Compact construction

Made from heat-treated steel

Ground gears

Low noise levels

Rotation precision < 0.01mm

Superior strength & durability

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Gerardi Spindle Speeders