Guide for bushings

••• Very suitable     •• Suitable     • OK     – Not suitable

	BK1 STEEL/PTFE	BK2 STEEL/POM	FB090 BRONZE BUSHING GREASE POCKETS	LATHED BRONZE BUSHINGS	HARDENED BUSHINGS	POLYAMIDE PA6	POLYAMIDE WITH MOS 2
Lubrication free	•••	••	–	–	–	••	•••
Dirt-resistant	•	••	•••	••	•••	••	••
Low friction	•••	•••	••	••	•	•	••
Corrosion resistant	•	•	•••	•••	••	•••	•••
High temperatures	••	•	••	••	•••	–	•
High loads	•••	•••	•••	••	•••	–	–
Vibration damping	•	••	•	•	–	•••	•••
High sliding velocity	••	••	•	•	•	•	•
Edge load	•	••	•	•	••	–	•
Moisture absorption (+235°C)	–	–	–	–	–	10%	1%
Economy	•••	•••	•••	•	•	••	•
Min/Max temperature °C	-195/+260	-40/+120	-60/???	-60/+170	-90/+380	-20/+80	-40/+130
Max static load N/mm²	250	250	140	160	650	20	80
Max dynamic load N/mm²	80	100	40	50	80	12	30
Max sliding velocity m/sec rotation	2,5	2,5	2,5	5	4	2	1
Max sliding velocity linear m/min	2,0	2,0	2,5	5	4	3	4
Shaft tolerance	f7-h8	h8	e7-F8	e7	f8	h6	h9-h7
Bearing seat tolerance	H7	H7	H7	H7	H8	H7	H7
Friction coefficient	0,003-0,20	0,01-0,10	0,002-0,23	0,08-0,15 (greased)	0,10-0,25	0,10-0,30	0,04-0,15
Processability	less good (due to slit)	less good (due to slit)	less good (due to slit)	very good	less good	good	good