Specs HYDRAULIC BREAKERS

Tool diameter is an important specification to watch. In general, large-diameter tools withstand wear and exert energy over a larger area. Allied

Allied of Solon, Ohio, has been manufacturing hydraulic impact hammers since 1969. The company now markets 12 models under the registered trademark Hy-Ram. Energy output ranges from 200 ft lb to 10,000 ft lb per strike.

The key design feature of the company’s hammers, according to a company brochure, is that they require little oil because a low-pressure gas charge is built in. Simplicity of design allows the company’s many distributors to stock all necessary replacement parts. Most of Allied’s hammers offer the advantage of a variable blow frequency. A long-stroke design minimizes recoil to the boom.

The company has various distributors in Canada, including Tracks Wheels Equipment Brokers of Sudbury, Ont. For more information on Allied Hy-Rams, circle reply card No. 45 NPK

The largest range of hydraulic breakers (15 models ranging in weight from 185 to 25,500 lb) is manufactured by NPK of Japan.

These hammers are distributed in eastern Canada by Laval, Que.-based Domar Equipment and in western Canada by Ohio-based NPK.

Features include a nitrogen chamber in place of an accumulator and a special rubber bracket on the bigger hammers to prevent vibration. The piston in each NPK hammer operates within a metal sleeve instead of simply in the housing of the hammer. This reduces maintenance costs because the replacement cost of a sleeve is lower than that of a piston.

Operators typically operate the hammers for 800 hours without doing any maintenance, says sales representative Gerard Houle.

The company’s 25,500-lb H-70X model is the largest in the world.

With slight modifications the hammers can even operate under water.

NPK does not manufacture hydraulic booms for its hammers. For more information on NPK hammers, circle reply card No. 46 Rammer

Rammer Oy manufactures 11 different hammers, ranging in weight from 220 to 12,125 lb, at its Finnish manufacturing plants. With a new manufacturing plant under construction, the company hopes to become the leading producer of hammers in the world by 1992.

Energy output for the company’s hammers ranges from 200 to 10,000 ft lb. Major features include a high, constant blow energy, regardless of blow frequency.

When the company acquired Kone Corp.’s Roxon Breaker Division in 1986, a number of hammers were eliminated from the product line to avoid duplication. Two new hammers have been introduced recently — the S 23 and the G 120.

The company has also developed various pedestal booms and power packs for its hammers. Five booms are available. Maximum horizontal reach ranges from 3.3 m to 12 m. Three power packs with power outputs of 37, 55 and 75 kw are also available. A separate business unit called Rammer Booms was established in 1988. It is based in Finland as well.

The company is striving to provide better technical support for its distributors, according to Pekka Heikkonen, president of Rammer Oy. The company’s products are distributed in Canada by Kent Air Products Canada in Mississauga, Ont. For more information on Rammer hammers and booms, circle reply card No. 47 Teledyne

France-based mining equipment manufacturer Teledyne also markets a complete range of hydraulic breaker systems. The company’s 12 hydraulic hammers range in energy output from 200 to 5,500 ft lb.

Six different boom models are available. Each is suited for a particular hammer and a particular application.

The company’s hammers have an energy-saving feature that reduces damage to the boom. Nitrogen gas in a so-called cushion chamber at the top of the hammer piston is compressed during the piston return stroke to provide maximum absorption of piston recoil and to store energy for the next blow.

The company’s branch office in Canada is in Thornbury, Ont. Tramac

This Montreal-based company is also a major supplier of hydraulic hammers to the Canadian market. Unfortunately, they did not reply to our requests for information. For more information on Teledyne’s breaker systems, circle reply card No. 48

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