High capacity
Seagull's High Capacity Air Bearing Spindle blends strength and beauty in combining stronger/stiffer air films that are used efficiently to support demanding applications including servo writing with twenty or more disks. A zero cogging motor and the capability of 30,000 RPM provides shorter processing times and higher throughput. Please refer to the Seagull white paper for additional information and testing results.
Features as shown:
1) 2.95"od cartrige construction (mounting flange not shown)2) Long Stainless Steel rotor thermally optimised for peak performance)
3) Air film stiffness matched to rotor stiffness
4) Center mounted zero cogging motor for exceptional motion control
5) Close coupled 1024 optical encoder for solid velocity feedback control
6) Evacuation Ring standard for exceptional particulation control
7) Filter provided for clamp circuit protection (see at right)
8) Crashproof Stainless Steel Construction
| Spindle specifications (high capacity) | |
| Speed (max) | 30,000rpm |
| Axial rotational error (repeatable) | <20 µ in |
| Axial rotational error (non-repeatable) | <1 µ in |
| Radial rotational error (repeatable) | <20 µ in |
| Radial rotational error (non-repeatable) | <1 µ in |
| Maximum Axial load | 90 lbs |
| Maximum Radial load (dual plane) | 84 lbs |
| Maximum Radial load (single plane) | 42 lbs |
| Axial stiffness | 80,000 lbs/inch |
| Radial stiffness (dual plane) | 800,000 lbs/inch |
| Radial stiffness (single plane) | 400,000 lbs/inch |
| Angular stiffness | 3,200,000 in-lbs |
| Polar inertia (spindle only) | .028 oz-in-sec² |
| working air gap | .00023± .00004 |
