Reduction Sleeve GEKO G00571 MT 4/3.3/2.2/1 (40) — stepped arbor bushing set

GEKO reduction sleeve G00571 MT 4/3.3/2.2/1 (40) is a stepped Morse taper arbor bushing set designed to adapt larger spindle or holder tapers to smaller Morse Taper sizes. The set contains concentric, precision-machined sleeves that allow secure fitting of tools or arbors with diameters 4 mm, 3.3 mm, 2.2 mm and 1 mm within a single stepped housing. It is intended for workshop and machine-tool environments where taper reduction is required for turning, drilling, grinding or reconditioning operations.

Advantages

The stepped design provides multiple reduction sizes in one compact component, reducing the need to change individual adapters. Precision machining ensures accurate concentric alignment to minimise runout and vibration. Hardened internal surfaces and a tight fit reduce axial play and improve the stability of mounted tools. The set is suitable for repeated use in machining processes and helps maintain consistent tool positioning.

Suitable for

• Adapting a machine spindle or holder to smaller Morse Taper tooling
• Mounting small-diameter arbors, drills or reamers in lathe operations
• Grinding, reconditioning or testing small tools in a machine-tool setup
• Workshop fixtures and jigs requiring compact taper reduction

Key specifications

• Stepped taper sizes: 4 mm, 3.3 mm, 2.2 mm, 1 mm
• Taper system: Morse Taper (MT) stepped adapter
• Construction: precision-machined concentric sleeves
• Fit type: interference or press fit for stable mounting
• Intended use: spindle-to-tool taper reduction for machining tasks

How to use

Select the sleeve step that matches the tool or arbor shank diameter and press the reduction sleeve into the machine spindle or larger taper holder until seated. Insert the tool shank into the corresponding internal step and secure according to the machine’s retained tooling method (drawbar, nut or wedge, where applicable). Ensure the assembly is clean and free of chips or debris prior to installation and verify concentricity and runout after fitting.

Usage recommendations

Use light lubrication on contact surfaces if required to aid installation; avoid excess oil that could permit slippage. Inspect sleeves regularly for wear or damage and replace when concentricity cannot be maintained. For precision operations, check runout with a dial indicator after mounting and re-tighten following the manufacturer’s machine-holder procedures.