Excavator rock breaker JTHB

Overview
Continuously expanding range of hydraulic attachments for demolition, recycling and general excavation. Designed for high productivity, durability and efficient hydraulic flow across a wide range of excavator classes.

Lehnhoff Quick Couplers
Lehnhoff Hartstahl GmbH (part of Komatsu) is a market leader with over 25 years of experience and approximately 150,000 units sold. The Lehnhoff portfolio covers excavators from PC09 to PC1250 and includes mechanical, hydraulic and fully hydraulic quick couplers to increase versatility and reduce attachment change time.

Komatsu Hydraulic Breakers
Komatsu offers a 33-model range of hydraulic breakers delivering high impact energy for rock and concrete demolition, tunnelling and quarry use.

• B-series: gas-charged piston breakers, simple and suitable for hard rock.
• H- and V-series: accumulator-type technology with advanced operating features.
• V-series: fully variable speed technology for optimized production in varied applications.

Komatsu sorting and demolition grapples
Grapples designed for primary and secondary demolition and recycling operations. Heavy-duty construction, oversize pins and bushings extend service life. Load control valve fitted as standard across the range. Ten models cover crawler and wheeled excavators from 2 to 70 tonne classes.

Komatsu Pulverisers and demolition crushers
Attachments engineered for efficiency, performance and reliability: large hydraulic components maximise oil flow and a custom speed valve enables short cycle times. Mechanical design focuses on durability and wear resistance. Key materials include Strenx® 960 for the main structure, Hardox® wear plates and alu-bronze bushings on the main hinge. Multiple sizes available to suit a broad range of machine classes.

Documentation
Product datasheets and brochures are available per attachment family (quick couplers, breakers, grapples, pulverisers and crushers) with technical data to support selection and integration.

Characteristics / technical specifications

• Lehnhoff quick couplers: coverage for excavators PC09 to PC1250; mechanical, hydraulic and fully hydraulic variants.
• Hydraulic breakers: 33-model range; B-series (gas-charged), H-/V-series (accumulator type), V-series with fully variable speed technology.
• Sorting & demolition grapples: 10 models; machine compatibility 2–70 tonne; standard load control valve; heavy-duty pins and bushings for extended life.
• Pulverisers & demolition crushers: available in multiple sizes; static pulverisers approx. 16–60 t machines; rotating pulverisers/crushers approx. 15–70 t machines; construction uses Strenx® 960, Hardox® and alu-bronze bushings; large hydraulic components and custom speed valve for short cycle times.
• Design focus: durability, wear resistance, maximised hydraulic oil flow, standard safety features on many models.