SMX PURPLE Specialty Vibration Isolator — “The Story”
These were specifically designed isolators to fit not only many Cummins mid-range engines but all other marine diesel engines in the 100-500 HP class with total engine / transmission weights totaling 2600 lbs or less. From 4 cylinder “shakers” to the smooth, but heavy CAT 3208’s and everything in between.
Our base mount footprint and “look” was patterned after the famous “Barry” B series mount (Cummins P/N: 3349230) that came into the market about 1994-ish and has shown to be the an excellent product over the years. Although the isolation qualities of the mount were excellent in many cases (not all), the adaptability of the mount left many gaps in where it could not be used successfully. The mount had a limited weight range, was not really “right” for the “shaker” 4-cylinder Cummins engines (and some “others”), and could not fit nor carry the weight of 1000’s of the V-8 Diesels that were out in the field sitting on the very old “Bushings Inc.” mounts with both ¾” & 1” studs, and did not adapt well to remote mount V-drive applications where extra engine isolation is needed.
These were our first concerns on our list of new design features we wanted to address. But along the way, we were also able to accomplish the following improvements:
|The base frame is stronger in overall strength in all failure mode testing. This is due to the use of heat treated A356-T6 aluminum in a low pressure casting process vs. A380 die cast material that is used for high production die cast parts (Usually to lower the overall production cost).|
|We also increased the “beef” in the two high stress areas to ensure a stronger mounting base more tolerant to irregular mounting surfaces & angles. This is to properly mitigate the additional stresses encountered in marine applications, especially due to newer high power densities we have not seen in the same sized engines prior.|
|We addressed the “STUD”… And after testing our competitors studs from other companies & reviewing over 2 decades of field experience, we settled on a Grade 12.9 Quenched & Tempered, Alloy Steel rolled to Class 2A specs & then baked the studs to remove any possible Hydrogen Embrittlement after plating. Although it was the more expensive choice, it was worth it to us. Actually, we designed two different high-strength studs, a 3/4” x 16 (most common) and a 1″ x 14 “stepped” stud with an alloy high-strength “load washer” so we could use the same mount to replace the low profile “antique designed” 4400 series Bushing Inc. mount used in many CAT and other applications.|
|Then we have our “Marine Tuff” coating using a proprietary E-Coat finish resulting in a superior saltwater resistant finish. And the best part of it all is…………We assemble these mounts to our specs right here Oxnard, California to ensure we are offering the best of all to our valued customers.|
FEATURES THE MOST EFFECTIVE REDUCTION OF NVH (NOISE, VIBRATION, HARSHNESS) available for INTERNAL COMBUSTION DIESEL ENGINES IN MARINE INSTALLATIONS — Some of our unique engine mount features include:
Our “SMX PURPLE″ mount comes in 4 Durometer versions and in 2 stud size options, chosen specifically to your exact application.
Choose from 4 available Durometers…
Specifically made for the Cummins 4B (naturally aspirated) and other “not so nice to be around” 4 cylinder engines, or for remote non-thrust engine application weighing up to approx. 1500 lbs.
We built this version to address lower HP Diesel inline 4-6 cylinder applications with package weight up to 1200 lbs. Examples include a 4BTA, 6B (naturally aspirated), Perkins 6-356, Ford Lehman 120, etc.
SMX 70 DUROMETER
Best for V-8 Diesel applications (CAT 3208, Detroit 8.2, and Cummins 504/555 applications) or other engine/gear packages that weigh over 1800 lbs or have deep ratio gears.
- Mechanically captive
- Resilient elements of an oil-resistant newly developed synthetic Chloroprene compound
- Corrosion resistant exposed metal parts
- Off-the-shelf availability
- Easy to install as the are the same foot print and dimensionally interchangeable as the Barry Cummins mount they replace
- SMX 100% long term Proven durability
- Easiest Load & Height adjustability available
- Improved ride comfort
- Significantly reduces mechanical noise transmission
- Able to transmit propeller thrust longitudinally along mount
- Superior isolation at start-up and low RPMs
- Marine Diesel Engines
- Generator Sets
- 4 new versions with multiple load ratings from 100 – 700 lbs per mount
Synthetic Chloroprene elastomer has an operating temperature range of -20°F to +180°F (-30°C to +85°C) and is resistant to oils, salt spray, ozone and oil-based solvents.
SMX Purple Mount Dimensions