Z series

Straight bore mounting

Pos. in hub	ø Bore	Hub
No.	Min-Max	Max l *	d2	d3	d4	n **
5	0.47 - 0.94	1.65	1.73	2.17	5.47	5
5	0.73 - 0.87	0.71	1.57	2.17	5.47	5
5	0.47 - 1.14	3.23	2.05	2.17	5.47	5
6, 7, 8, 9, 12, 16	0.37 - 0.59	1.22	1.10	2.95	3.54	5
6, 7, 8, 9, 12, 16	0.49 - 0.87	1.65	1.57	2.95	3.54	5
6, 7, 8, 9, 12, 16	0.87 - 0.98	2.05	1.77	2.95	3.54	5
6, 7, 8, 9, 12, 16	0.87 - 1.10	2.44	2.01	2.95	3.54	5
6, 7, 8, 9, 12, 16	1.06 - 1.57	3.23	2.87	2.95	3.54	5
6, 7, 8, 9, 12, 16	1.57 - 1.89	4.41	3.54	2.95	3.54	10

* To obtain a longer boss length it is possible to add a boss extension. Universal boss extensions are available in lengths of 10mm, 20mm and 40mm, and can be combined to a given length.
** n is the number of bolts in the bolt circle d4

If the diameter of your desired aluminium impeller exceeds ø750mm and your desired bore exceeds ø38, we use bosses from the W-series as standard.

Technical information on our 5 bladed hubs (PDF)
Technical information on our casted bosses (PDF)

Conical bore

If you need a conical bore, please contact your local distributor.
In order to identify a conical bore the following information is required:

Bore (i.e. ø0.63)		Cone (i.e. 1:5)
Cone Length (i.e. 0.87 inch)		l (i.e. 2.44 inch)
		Counterbore (i.e. ø1.42)