Making toilet bowls is more complex that it might seem. The two-part ceramic assembly comprising a moulded box rim stuck to the closet body weighs around 35kg and is awkward to manoeuvre. Casting machinery engineer Britech automated the job with a handling rig which uses rail guides rather than linear bearings to rotate the rims through 90i. The Speedi-roll rail guides have double-sealed and capped rollers, for low sensitivity to dusty atmospheres.
SKF LINEAR MOTION ON EXPRESS ENQUIRY CARD 200
* Power transmission company Igus has brought out a self-adjusting range of linear bearings that tolerate lateral and angular misalignment. DryLin bearings are made from Iglidiur J, a low-friction polymer material. Benefits are said to include the ability to use non-hardened shafts – which recirculating ball bushes cannot – and the use of O-rings to compensate for radial misalignment up to 0.4mm.
IGUS (UK) ON EXPRESS ENQUIRY CARD 201
* Bearings capable of working dry at up to 1,000iC are part of the ball and roller range developed by Tecmaco for hostile environments. Other types can handle sulphuric acid and other cleaning agents even at high pressures.
TECMACO ON EXPRESS ENQUIRY CARD 202
* Dutch company Bal Seal’s PTFE-based seals are energised by canted-coil springs that provide a near-constant sealing force despite changes in wear, tolerances and temperature.
BAL SEAL ENGINEERING ON EXPRESS ENQUIRY CARD 203
* Seals company Durametallic Type B mechanical shaft seals are suitable for refinery applications. Specified for low temperature service and featuring a non-pusher rotating bellows design, they are intended for use with clean water in excess of 80iC, together with sour water, caustics and acid solutions.