Klingelnberg G 27

$800,000 - $1,200,000 Updated 2026-03-16

Key Specifications

Max Workpiece ⌀

270 mm (10.6 in)

max workpiece module

6 mm

grinding method

Continuous generating grinding (CBN)

gear types

Spiral bevel, hypoid, Cyclo-Palloid

achievable quality

AGMA 13-15 / DIN 5

workhead speed

Up to 300 RPM

Overview

The Klingelnberg G 27 is a CNC bevel gear grinding machine from Klingelnberg, the Swiss-German company that is the global leader in bevel gear technology — the manufacturer of both the grinding machines and the Palloid and Cyclo-Palloid bevel gear systems that define the geometry standards for automotive axle, aerospace, and industrial bevel gear production. Klingelnberg's G series represents the production grinding of bevel gears (spiral bevel, hypoid, and Cyclo-Palloid geometries) after heat treatment, achieving the surface finish and profile accuracy required for quiet, long-life bevel gear sets in automotive differentials, aerospace gearboxes, and industrial drives.

The G 27 handles bevel gears up to 270 mm (10.6 in) reference diameter, covering the full range of automotive rear axle ring and pinion sets, helicopter transmission bevel stages, and mid-size industrial bevel gears. The machine uses continuous generating grinding with CBN (cubic boron nitride) grinding wheels to produce AGMA 13-15 / DIN 5 quality bevel gears — the quality levels required for automotive axle and aerospace gearbox applications where noise, life, and efficiency are all specification requirements.

Klingelnberg integrates their proprietary KIMoS (Klingelnberg Integrated Manufacturing of Spiral bevel gears) closed-loop manufacturing system, linking the G 27's grinding process to CMM measurement data for automatic correction of systematic geometric deviations across production runs. This closed-loop approach is the standard for automotive bevel gear production where process control must maintain gear quality across thousands of parts per shift.

At $800,000-$1,200,000 new, the G 27 is the reference machine for automotive axle gear grinding. The major automotive axle gear manufacturers — Dana, American Axle, GKN, and their Tier-1 peers — run Klingelnberg G series machines as the production standard for their ring and pinion grinding lines.

Full Specifications

Parameter	Value
Max Workpiece Diameter	270 mm (10.6 in)
Max Workpiece Module	6 mm
Grinding Method	Continuous generating grinding (CBN)
Gear Types	Spiral bevel, hypoid, Cyclo-Palloid
Achievable Quality	AGMA 13-15 / DIN 5
Workhead Speed	Up to 300 RPM
Cycle Time Reference	~60-120 sec (automotive axle ring gear)
CNC Control	Klingelnberg CNC with KIMoS integration
Machine Weight	~12,000 kg (26,455 lb)

Specifications sourced from klingelnberg.com — verified 2026-03-28

Strengths & Limitations

Strengths

Klingelnberg is the global standard for automotive and aerospace bevel gear grinding — OEM-specified for Dana, GKN, and American Axle ring and pinion lines
Continuous generating grinding with CBN produces AGMA 13-15 / DIN 5 quality in production cycle times of 60-120 seconds per gear
KIMoS closed-loop manufacturing system automatically corrects systematic geometric deviations using CMM feedback
270mm capacity covers the full range of automotive rear axle and front axle ring and pinion gear sizes
Integrated measurement and correction eliminates manual process adjustments — critical for Tier-1 automotive supplier quality systems

Limitations

$800K-$1.2M investment requires high-volume automotive or aerospace bevel gear production to justify
Klingelnberg's proprietary Cyclo-Palloid geometry requires Klingelnberg cutting and grinding machines throughout the process chain
CBN wheel costs and dressing tool costs are significant operating expenses in production grinding
Machine requires temperature-controlled environment and vibration-isolated foundation for consistent accuracy
12,000 kg machine weight and foundation requirements are significant site preparation challenges

Best For

Automotive axle gear manufacturers (Dana, GKN, American Axle, Linamar) grinding ring and pinion bevel gear sets for passenger car and truck axles Aerospace gearbox manufacturers grinding spiral bevel and hypoid stages for helicopter main rotor transmissions and turboprop accessory gearboxes Industrial drive manufacturers producing high-quality spiral bevel gears for conveyors, mining equipment, and marine propulsion drives Defense contractors grinding bevel gear sets for military vehicle transfer cases and rotorcraft transmissions Agricultural and construction equipment manufacturers grinding high-load bevel gear sets for axle differentials and final drives

Frequently Asked Questions

01 What is a Cyclo-Palloid bevel gear and why does it require Klingelnberg machines?

Cyclo-Palloid is Klingelnberg's proprietary spiral bevel gear geometry, characterized by a face-milled (as opposed to face-hobbed) tooth profile cut with Klingelnberg's special cutter geometry. Cyclo-Palloid gears have slightly different tooth geometry than Gleason spiral bevels and require Klingelnberg cutting, lapping, and grinding machines specifically designed for this geometry. The geometry is optimized for quiet operation and high load capacity, making it the preferred system for passenger car axles where noise (NVH) is the primary customer-perceived quality metric.

02 What bevel gear quality is achievable with the G 27?

The G 27 produces AGMA 13-15 quality bevel gears, which corresponds to DIN 5 tolerance grades — the highest precision class in bevel gear standards. At this quality level, tooth profile errors, lead errors, and pitch errors are all in the single-digit micron range. This quality is required for automotive axle gears (low noise, high efficiency), aerospace gearboxes (precision engagement, long life), and high-speed industrial drives where gear mesh quality directly affects noise and efficiency.

03 What is the KIMoS closed-loop manufacturing system?

KIMoS (Klingelnberg Integrated Manufacturing of Spiral bevel gears) is Klingelnberg's software system that links gear measurement data from a CMM or gear measuring instrument directly back to the G 27's grinding machine parameters. When systematic geometric deviations are detected in measured gears (predictable drift in tooth profile, lead, or pitch), KIMoS automatically calculates and applies the correction to the machine parameters for subsequent grinding cycles. This automated closed-loop approach is essential for automotive production where quality must be maintained across shifts without manual process adjustments.

04 How does Klingelnberg compare to Gleason for bevel gear grinding?

Klingelnberg and Gleason are the two dominant bevel gear machine manufacturers globally. Gleason (Rochester, NY) has the stronger North American market presence and specializes in face-hobbed spiral bevel and hypoid gears using the Gleason geometry system (used by most US and Asian automotive OEMs). Klingelnberg (Zurich/Cologne) dominates European automotive and aerospace, using Cyclo-Palloid and Palloid geometries. The choice between systems is largely driven by the OEM's preferred gear geometry — automotive suppliers must match the machine system to their OEM customer's gear geometry specification.