Original biconic
High speed, excellent angular stiffness and capacity, Crash-Proof, low rotary inertia, excellent velocity control and flexible packaging defined the Original Bi-Conic bearing. The modular configuration allowed the bearing to feature almost any mounting flange location and bolt pattern. Additionally most any tooling adapter could be easily integrated. As Seagull had pioneered the 2" BC pattern with the male 1-1/2" precision pilot, most were sold in this configuration. Substantial quantities were also sold with competitors patterns as field replacements by customer demand. This spindle was responsible for putting our service department out of business due to a lack of returns.
Features as shown:
1) Integral Fan Cooled Brushless DC non-cogging motor2) Integral 1024 line differential encoder
3) Integral particulate Evacuation Shroud.
4) Moveable mounting flange for maximum versitility
5) Industry Standard 2.0" piloted clamp mounting interface (others available)
6) Large installed base
| 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 |
