Rotary-head drive 311

Overview

A reinforced version of the 310 series with output torque raised to 40,000 N·m at ratio 32.7.

First-stage planet carrier: 36 spline teeth, 260 mm maximum diameter. Second-stage ring gear: 68 teeth, φ420 outer diameter, 95 mm height.

Motor coupling sleeve with 24 / 27 spline teeth, φ85 bearing seat, 83.5 mm overall height.

Documentation: 24-item exploded view and parts schedule.

Applications

• High torque rotary head
• Hard rock large diameter boring
• Very deep piles
• Rotary head overhaul

Order spares straight from the exploded view: each callout number matches one line in the parts list, which shows an outline and part number for every item. Tell us the callout number and we will confirm the part.