Shop Solutions
one quality level down from aerospace gearing,” Leone said. “To get maximum efficiency, the OEM will utilize a drive ratio with a 1 1/2" [38-mm] diameter gear tooth pinion driven with a 35" [889-mm] diameter gear. These pinions can run up to 75,000 rpm. There are impellers assembled and precision balanced, and there are very tight fits within the housing of the compressors, so the diameter sizes have to be tightly toleranced and controlled. Again, ±0.0002" [0.005 mm] is a common tolerance for these pinions, and concentricity of these diameters is 0.0002" as well. A surface finish of 6 µin. (0.15240 µm) is common. There is an electronic probe (vibration sensor) assembled into the compressors so if the bearings start to wear, and these pinions start to shimmy and shake, when they reach a certain threshold, the compressor will shut down. For that industry the tolerances are critical, and this is probably some of the tightest tolerance work we do here. Again, being a job shop, we do a lot of compressor gear- ing for different OEMs.”
“In our process,” Leone said, “we are doing OD grind- ing on both Studers. The S40 was purchased as a universal grinder to do many different types of parts, while the S33, which is more of a base machine, was purchased to do a specific line of parts. Gear-tooth grinding is done on an entirely different machine, one specifically designed to grind precision gear teeth.” ME
For more information from United Grinding Technologies, go
to
www.grinding.com, or phone 937-847-1229; from Milwau- kee Gear go to
www.milwgear.com, or phone 414-395-4122.
Custom Rollers Move Heavy Loads Effortlessly
P
itts Little Corp. (Birmingham, AL) is a manufacturing company that specializes in the design, fabrication and installation of radiation-shielding materials for medical, phar- maceutical, governmental and industrial applications. The company, founded in 1994, works with architects, construc- tion companies and customers as they build facilities that require radiation-shielding products.
Osborn Load Runners move heavy loads like radiation shielding doors manufactured by Pitts Little Corp. for cancer-treatment facilities, quietly and reliably.
Tom Bargeron, a design consultant for Pitts Little, began working to design the door systems used in radiation therapy rooms more than 10 years ago. Used in the treatment of can- cer patients, the radiation therapy rooms are designed with up
Thousands of enclosures Hundreds of options
ENCLOSURES ENCLOSURES
Thousands of enclosures Hundreds of options
Designed and delivered in 10 days POPOWER DISTRIBUTION WER DISTRIBUTION Designed and delivered in 10 days CLIMATE CONTROL CLIMATE CONTRO
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