Marley® Geareducer®: M Series
Lower Maintenance Costs
Marley® M Series Geareducers® require fewer oil changes compared to others that require oil changes multiple times each year.
Long Life Bearings are Standard
All Marley bearings have 100,000 hours minimum L10A service life.
Marley M Series housings are 40% thicker.
Cooler Operating Temperatures
Marley Geareducers have 25% greater surface area than other manufacturers, along with 3x larger oil passageways to ensure maximum service life.***
Integral Pinion Shaft
Marley Geareducers have a single piece spiral bevel gear head integrated with the pinion shaft for maximum strength, while other manfucturers will use multiple piece pinion arrangements.
Premium Oil Seal
Marley M Series utilize a premium Inpro seal on input shaft to eliminate grooving and promote long life.
Marley M Series use steel shims at all necessary casting connection points to maintain gear settings as the unit ages.
Lower Installation Costs
Marley does not require external vent lines, while others do.
Marley M Series are designed to be simple, without the need for oil pumps, filters, or other options that add complexity, additional maintenance and potential for failure.
*National Technical systems (NTS) in 1998. Concurrent testing was conducted on Marley and Amarillo gear speed reducers in accordance with SAE J2101 at various speeds and loads.
**Lw = 10 log 10 (W/10^-12) dB)
***Amarillo 1712 vs. Marley M1712; Amarillo surface area based on actual measurements of case with estimations given to account for curved faces. Result is 4,086 sq. in. surface area for Amarillo 1712 vs. 5,108 sq. in. for Marley M1712.
|Oil should be replaced every 3,000 hours
|Original oil should be replaced after just 500 hours or 4 weeks of operation. Afterwards, intervals of 2 or 3 months may be required for a very moist atmosphere*, resulting in up to $1,419 more in annual oil change costs
|Marley Geareducers use double row interstage shaft bearings that yield 3x the bearing life of single row bearings**
|Amarillo uses single row interstage shaft bearings **
|Marley M1712 has 40% thicker housing for robust lower bearing support and reduced sound/vibration.
|Amarillo 1712 has 40% thinner housings
|Marley M1712 has 25% more surface area and 3x larger oil passageways than the Amarillo 1712, to ensure maximum service life
|Amarillo 1712 has 25% less surface area than Marley M1712, along with smaller oil passageways
|Marley Geareducers have a single piece spiral bevel gear head integrated with the pinion shaft for maximum strength
|Amarillo 1712 has a keyed gear for connection to the pinion shaft, resulting in multiple components and increased stress concentrations
|Marley M Series utilize a premium Inpro seal on input shaft to eliminate grooving and promote long life
|Amarillo standard lip type seals wear against the input shaft which can cause grooving over time that may require complete shaft replacement
|Marley M Series use steel shims at all necessary casting connection points to maintain gear settings as the unit ages
|Amarillo uses plastic shims that are more susceptible to fatigue and may lead to gear setting changes over time, which can impact sound, vibration, wear, and life of unit
|Geareducers do not require an external vent line
|An external vent line is required in “wet towers”*
**Based on current Timken bearing rating method for Marley Series 4000 vs. Amarillo A36.