The primary reason to use alternative materials for sliding tools is to achieve a good compromise between friction coefficient, wear of materials and cost of the product. Bronze is often the best solution, because of the average coefficient of dynamic friction, called μrd. If compared to Steel/Steel sliding (0.3), it is about half on dry Steel/Bronze surfaces (0.18), but if used with lubricating grease, the coefficient of the Bronze becomes extremely low (0.04) contrary to the Steel (0.12).
In some cases, our bronze bushes are built with internal oil grooves, like the EBU-1B. Components like the EBU-4B, EBU-5B and EBU-7B instead, are made in steel with an internal bronze layer, oil grooves and a plug for the forced lubrication, instead.
Besides, we can always produce bronze bushings with shapes on drawing, even for large dimensions.
Please send your drawings: firstname.lastname@example.org.