Technical Specifications

Dimensions

• Models 420, 440: 16.5"W x 16"D x 9.25"H
• Model 450: 16.5"W x 16"D x 11.25"H
• Motor Controller: 13"W x 13"D x 5"H

Weight

• Model 420: 60 Lbs.
• Model 440: 110 Lbs.
• Model 450: 135 Lbs.

Drive System

• Low cogging multi-phase permanent magnet synchronous motor
• Magnetic damping via eddy current brake
• High torque capability (563 oz/inch)
• High resolution digital drive signal synthesis
• Speeds Supported: 33-1/3, 45 and 78
• Speed Accuracy
  • 33-1/3 RPM: -0.011% +- 0.003%
  • 45 RPM: -0.006% +- 0.003%
  • 78 RPM: -0.160% +- 0.003%
• Pitch adjustment available via internal DIP switch, 32 steps at 0.34% per step (33-1/3 RPM) and 0.46% (45 RPM).
• Optional sleep timer (shuts off after 42 minutes of uninterrupted operation)

Bearing Assembly

• Upward facing, platter embedded
• High center of gravity (thrust surface is above lower platter surface)
• 1" diameter stainless steel spindle
• Thrust surface: 1/2" precision ball bearing and a replaceable Delrin/brass thrust plate.
• High precision ground and polished bearing surfaces with precise 4-5 ten thousandths radial clearance.
• Oil bath design with viscous damping and superior lubrication

Power Requirements

• 115-125 VAC, 0.68 Amps, 85 watts
• 230-250 VAC, 0.34 Amps, 85 watts
• Detachable IEC power cord