Straddle carriers based on new technology
Challenge: bearings of straddle carriers are not reliable enough
Solution: development of bespoke bearings meeting all requirements
Straddle carriers suspensions use wheels connected to kingpins for their eight or ten steerable wheels. The kingpins are supported by top bearings. Traditionally roller bearings were used for this purpose, however, this kind of bearing is not very well suited for the application. Life times are relatively short and inconsistent. Replacement of failing bearings is an extensive operation taking a carrier out of the operation for serious amounts of time.
Condition monitoring of these bearing up to now has not been successful. With a broken king pin top bearing, the carrier needs to be taken out of service and brought in for repairs, both carrying significant costs. When a broken bearing is not detected early enough it can lead to extensive and expensive collateral damage to the expensive kingpins and surrounding parts.
For the top bearings a whole new concept has been made, in which the horizontal and vertical loads are accommodated separately. The metal parts are made out of stainless steel and are combined with D-glide® sliding surfaces. The design is compact and can be fitted into existing carriers without any modifications.
The new bearings are durable and maintenance free. The weakest link in the suspension system has been eliminated, increasing the reliability to the highest level possible with today’s technology. Downtime is reduced to the minimum as is the risk of costly repair, with all consequential positive financial and operational advantages.