Blue Magnetic Ball Prism Base 33mm – For 1.5" Prisms, 3kg Holding Force

The blue magnetic ball prism base is designed for use with 1.5" (38.1mm) spherical prisms. Manufactured from anodised aluminium, it features an integrated permanent magnet with an approximate holding force of 2–3kg.

With a 30.8mm height offset (H0), a 12mm centre hole and a 35mm external diameter, this compact base provides a magnetic mounting point for surveying and monitoring applications. A Ø40mm protective cover plate is included.

Key Features

• Designed for 1.5" (38.1mm) spherical prisms

• Integrated permanent magnet

• Approximate magnetic holding force of 2–3kg

• Blue anodised aluminium construction

• 30.8mm height offset (H0)

• Ø12mm centre hole

• Supplied with a Ø40mm protective cover plate

Technical Specifications

• Product type: Magnetic ball prism base

• Prism diameter: 1.5" (38.1mm)

• Base diameter: Ø33mm

• External diameter: Ø35mm

• Height offset (H0): 30.8mm

• Magnetic holding force: Approx. 2–3kg

• Centre hole: Ø12mm

• Material: Aluminium

• Finish: Blue anodised

• Included accessory: Ø40mm protective cover plate

• Manufacturer: Bohnenstingl

• Product reference: 1457.S

Product Overview

The Bohnenstingl 1457.S magnetic ball prism base is a compact mounting solution for 1.5" spherical prisms. Its integrated permanent magnet allows it to be attached to suitable magnetic surfaces, while the supplied protective cover plate can be fitted when the base is not in use.