...Bushings GUIDE a Shaft or a Drill Bit, to a Point, AXIALLY i.e. SLIDING in and Out, as In the 'Steering Rack' BUSHING.
A BEARING Supports a shaft that will ROTATE within It, and will Rotate AROUND the Shaft. As in a ZF Input Shaft and PILOT BEARING.
Oilite...Real Oilite is a Sintered Bronze that is Compressed at TONS of Pressure to remain 'Solid'. It is Porous and the pores are filled with a Light Oil. Oilite Never Drys-Out! Just warming it, and wearing-in, will cause the Oil to Oooze Out of the Pores. Carrying it in Your pocket, is Not advised, and will cause a Stain in Your Nice Pair of Slaks.
Oilite is Very Soft! Soft enough to Crush, Disrupt, Meld. It will 'Move', adjust, Conform from a High Point to a Low Point, thus self adjusting to most any Mis-Alignment, Axially, of the ZF Input Shaft. A custom Fit. 'Real' Oilite is Never Magnetic. Yes, I check this at all times. At the MOST, there may be 0.10 % Iron. This will not mar or wear the 'Gear-Hardened' Snout of any ZF! I have Tested these Bearings 'To Destruction'! Running the Bearing in the Lathe at 3000 RPM and Driving a Hard Steel Bar directly into it, with Great Force...the Oilite just 'Crushes', and is Displaced Out of the Way. Oilite Bronze is the Best Material for this Job.
MJ