TechArchive

Original article date: December 1996 The SNL bearing housing is designed on the split plummer block principle, to offer flexibility in bearing choice. Designing the SNL split plummer block housing on a modular principle allows a wide choice of bearings to be selected, including spherical roller bearings, self-aligning ball bearings or CARB. Overall bearing performance [...]

Original article date: June 1998 Making best use of different media a new CD-Rom and a web site are now integral components of Timken’s marketing plans. Users of bearings now have a new tool at their disposal. The Interchange Guide from British Timken is a new PC-based cross reference database with three integrated search functions. [...]

Original article date: October 1998 How can a tiny planetary gearbox replace a big worm box? It’s not black magic just good engineering says PAUL SIXSMITH of Lohmann + Stolterfohlt Conventional industrial gearboxes are traditionally specified by working from tables in the manufacturer’s catalogue and using just power speed and a service factor. Yet working [...]

Original article date: May 1999 GKN Westland Helicopters (GKN WHL) finds that general “machine monitoring solutions” have little relevance to the sophisticated and critical helicopter environment says Principal Mechanical research Engineer MIKE HORSEY. Vibration health monitoring (VHM) of helicopter transmissions has evolved at GKN WHL from an interesting research activity to committed systems on production [...]

Original article date: June 1999 Did you know linear bearings were poorly designed? So says DAVID BUCKLEY regional manager of THK Canada who explains why new products based on the Caged Ball system are now appearing in the UK. You probably did not know there was anything wrong with the design of the linear bearings [...]

This article was originally written in the period 1995-2000 Flexible shafts can be applied to a wide range of transmission problems. But how to select the right assembly? Some guidance from leading suppliers. Dos and Don’ts of Flexible Shafts DOs Determine power requirements using both hp and torque to choose the proper diameter core for [...]

This article was originally written in the period 1995-2000 How do you select the required sprocket combination, belt length and centre distance for belt drives? This feature from GATES looks at some of the construction features for the Poly Chain GT. Guide flanges are needed in order to keep the belt on the sprocket. Due [...]

This article was originally written in the period 1995-2000 Do you know the difference between absolute accuracy and non-accumulation of pitch error? Metal belts – thumbnail profile Durability:-a variety of alloys may be used, each with its own resistance to chemicals, humidity and corrosion. Engineers generally select a belt material on physical properties (belts have [...]

Original article date: January 1999 Gearbox catalogues present information in different ways making the life of an engineer more difficult. TONY FLETCHER, JBJ’s technical specialist for gearboxes explains why and what to do. Imagine the situation…you have your design on the board (or screen!) and the final drive required could not easily be achieved by [...]

Original article date: September 1997 Lubricant contamination is a frequent hazard to bearing life in automotive transmissions. One answer to the problem is to use “Sealed Clean” bearings, which employ dynamic rubber seals to exclude significant contamination from transmission bearings, while allowing oil to enter. However, there are many roller bearing applications where it is [...]