Tuesday, October 15, 2019

Tooth Tips

When figuring gear capacities, the load capacity of the lubricant must be considered in...

We consider gear capacities from the effects of loads on strength and wear, but we should not neglect the “third” criteria; the load capacity...

Tooth Tips: John Amendola Sr.

The formulas to which each gear standard is based produce different results in rotor size and tooth geometry. Here are the important points to...

Tooth Tips: William Crosher

Over the past 100 years there has been a remarkable improvement in gear capacities. This increase in the density of a power transmission unit...

Tooth Tips: William Crosher

Bronze Bronze Forgings and Castings Gear bronzes are designated according to their major alloying element. Only the aluminum and beryllium copper bronzes can improve their...

Tooth Tips: William Crosher

Popular practice is to mill the worm, heat treat, finish grind and, for best results, polish. Material for the worm requires a hard, smooth...

Tooth Tips: William Crosher

The first scale for comparing the hardness of materials was devised by the German mineralogist Friedrich Mohs in 1820. The scale is based on...

Tooth Tips: William Crosher

Continuing our conversation from the May issue, “Sigma” is a statistical measure of standard deviation. It is accomplished by a manufacturer’s close coordination with...

Tooth Tips: William Crosher

The gear industry faces a constant challenge in keeping abreast of regulations, standards, and customer requirements. Governments around the globe impose regulations, and our...

Tooth Tips: William Crosher

In the present day a precision reducer's backlash is typically three to six arc minutes, and on an eight inch pitch diameter that is...

Tooth Tips: William Crosher

Among the many considerations when considering the gear mesh, backlash is high on the list of misunderstandings. Backlash has a cyclically fluctuating value between...

Tooth Tips: Nick Sudzum

After a replacement set of gears have been properly manufactured and thoroughly inspected in a tester to insure that the proper contact pattern has...

Tooth Tips: Nick Sudzum

My last column covered the basics of the reverse/inverse engineering process, which is only the tip of the iceberg. Let's assume that everything went...

Tooth Tips: Nick Sudzum

Regardless of type or style, when bevel gears need to be replaced and manufacturing drawings are no longer available, your gear can still be...

Tooth Tips: Nick Sudzum

Bevel gears are predominantly manufactured using low carbon alloy materials and then carburized and hardened, or case hardened, with an effective case depth of...

Tooth Tips: Nick Sudzum

As described in last month's column, gear tooth problems are usually recognized at higher frequencies with exact multiples from your readings on your gearbox....

Tooth Tips: Nick Sudzum

Vibration can be defined as the repetitive periodic motion of a machine and/or its components such as gear trains, gear drives, gear boxes, drive...

Tooth Tips: Andy Milburn, P.E.

Just as a doctor uses blood tests to monitor our health, oil analysis can be a powerful tool to monitor the condition of both...

Tooth Tips: Andy Milburn, P.E.

This months' installment is the second of three on gearbox lubrication. This column will cover issues related to the selection of gear and bearing...

Tooth Tips: Andy Milburn, P.E.

Proper lubrication of gears and bearings is essential to their operation and to achieving long life. It is a very complicated subject, and an...

Tooth Tips: Andy Milburn, P.E.

The parameters that usually have to be examined are bearing deflections, shaft deflections, pinion torsional windup, housing deflections, and external forces on the input...
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