Standard Biconic mark 2
Developed for customers that desire improved performance while retaining there existing inventory of disk clamps.
This is accomplished by adding a light weight clamp addapter to Seagull's ultra low inertia spindle. Should faster acceleration/deceleration requirements be needed in the future simply remove the adapter and upgrade to one of Seagull's lightweight disk clamps
Features as shown:
1) 30,000 rpm capability2) Excellent for temperature chamber work due to neutral air gap expansion
3) Lower inertia than legacy Bi-Conic
4) Can be upgraded to Ultra Low Inertia configuration
5) Three year warranty
6) Vacuum Shroud standard
7) Total Particulate Control option available
| Spindle specifications (biconic) | |
| Speed (max) | 20,000rpm |
| standard motor | 12,000rpm |
| 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 | 100 lbs |
| Maximum Radial load (dual plane) | 90 lbs |
| Maximum Radial load (single plane) | 40 lbs |
| Axial stiffness | 346,000 lbs/inch |
| Radial stiffness (dual plane) | 400,000 lbs/inch |
| Radial stiffness (single plane) | 218,000 lbs/inch |
| Angular stiffness | 412,000 in-lbs |
| Polar inertia (spindle only) | .0225 oz-in-sec² |
| Polar inertia (25mm clamp with 1.000 'Z' and .0315'' disk) | .0369 oz-in-sec² |
