What it is

The LDS V850 is a medium-force electrodynamic shaker rated at up to 5,000 lbf (22.2 kN) sine force, built for vibration and mechanical shock testing with sinusoidal, random, or transient excitation. It comes with a choice of two armatures. The V850-240 has a 9.45 in (240 mm) armature for up to 125 gn sine acceleration. The V850-440 has a 17.32 in (440 mm) armature for large fixtures and the full 5,000 lbf (22.2 kN) rating. Both versions deliver 2.0 in (50.8 mm) of peak-to-peak displacement and 78.7 in/s (2.0 m/s) velocity, carry 770 lb (350 kg) on the internal load support, and are driven by the LDS SPA-K switching amplifier from 8 to 32 kVA.

• Sine force: up to 5,000 lbf (22.2 kN) peak (V850-440 with SPA32K)
• Random force: up to 5,000 lbf (22.2 kN) rms (V850-440 with SPA32K)
• Half-sine shock force: up to 9,976 lbf (44.4 kN) (V850-440 with SPA32K)
• Acceleration: up to 125 gn sine peak (V850-240) and 60 gn random rms (V850-240)
• Velocity: 78.7 in/s (2.0 m/s) sine peak
• Displacement: 2.0 in (50.8 mm) peak-to-peak
• Usable frequency range: DC to 2,600 Hz (V850-240); DC to 3,000 Hz (V850-440)
• Internal load support: 770 lb (350 kg)
• Recommended amplifier: LDS SPA8K, SPA16K, SPA24K, or SPA32K

What it is used for

Some of the use cases for the LDS V850 include:

• Sine testing: swept and dwell testing at up to 125 gn with the V850-240.
• Random vibration testing: random profiles up to 5,000 lbf (22.2 kN) rms with the V850-440 and SPA32K.
• Mechanical shock testing: 2 ms half-sine pulses up to 9,976 lbf (44.4 kN).
• Transient testing: transient excitation for time-history replication.
• Heavy payloads: test articles supported by the 770 lb (350 kg) internal load support.
• Horizontal and under-chamber testing: using a combo slip table, the body rotation gearbox, or under-chamber operation.

Key features

• Two armature sizes: 9.45 in (240 mm) for maximum acceleration, or 17.32 in (440 mm) for large fixtures and maximum force.
• Four amplifier sizes: SPA8K through SPA32K, so force can be sized to the test program.
• Two mounting choices: solid trunnions, or Lin-E-Air air-isolated trunnions with a body suspension resonance below 5 Hz.
• 2.0 in (50.8 mm) displacement: long stroke for low-frequency testing, with velocity to 78.7 in/s (2.0 m/s).
• Internal load support: carries 770 lb (350 kg), controlled from the pneumatics pedestal box.
• Flush or raised armature inserts: available on both armature sizes.
• Pneumatics pedestal box: emergency stop, Lin-E-Air and load support control valves, and armature position indicator.
• Wide option list: combo slip table, V-groove castors, air glide, chamber floor support, cooling fan silencer, acoustic enclosure, thermal management, and head expander.

Why engineers pick it

A platform that grows with the lab. Start with an SPA8K and scale through SPA16K and SPA24K to the SPA32K. On the V850-440, sine force climbs from 1,290 lbf (5.7 kN) to 5,000 lbf (22.2 kN) across that range.

High acceleration or large fixtures. The V850-240 reaches 125 gn sine. The V850-440's 17.32 in (440 mm) armature carries large fixtures at full rated force.

Isolation built into the mount. Lin-E-Air trunnions keep body suspension resonance below 5 Hz, allowing testing down to 5 Hz. On air isolation mounts, body resonance is below 10 Hz, with an 8 Hz recommended minimum for base mounting.

Flexible system forms. Lin-E-Air trunnion-mounted with a body rotation gearbox, combined with a horizontal hydrostatic slip table, or configured for under-chamber operation.

The V850 system

• LDS SPA-K switching amplifier: SPA8K, SPA16K, SPA24K, or SPA32K; 100 V rms rated output, 80 A rms per 8 kVA increment.
• Pneumatics pedestal box: emergency stop, Lin-E-Air suspension air control, armature position indicator, and load support control.
• Shaker cooling fan: 50 Hz or 60 Hz, with an optional silencer.

Site requirements

• Power: 3-phase, 380 to 500 V, 50/60 Hz as standard. A low-voltage option covers 200 to 220 V, 50/60 Hz. Maximum steady-state input runs from 26.0 kVA (SPA8K) to 47.6 kVA (SPA32K), including amplifier, cooling fan, and pedestal box.
• Compressed air: 100 psi (6.9 bar).
• Ambient: shaker +45 to 86 °F (+7 to 30 °C); amplifier +41 to 86 °F (+5 to 30 °C).
• Acoustics: 118 dBA shaker, 99 dBA cooling fan, and 70 dBA amplifier at 3.3 ft (1 m).

Configuring and scaling

Select the V850 configuration on this page and use Request Quote to start your system. Contact W5 for items the selector doesn't cover: armature size (240 or 440 mm), SPA-K amplifier size, solid or Lin-E-Air trunnions, flush or raised inserts, low-voltage supply, and options such as combo slip table, silencer, acoustic enclosure, thermal management, or head expander.

For a lighter system, the LDS V830 delivers up to 2,205 lbf (9.8 kN) and up to 120 gn on its 185 mm armature.

Get the V850 specified, installed, and supported

W5 Engineering is the authorized North American distributor for LDS / Brüel & Kjær. We configure the V850 to your force, acceleration, and payload targets — armature size, amplifier rating, and mounting — then install it and support it. One PO covers the shaker, amplifier, ancillaries, and commissioning. Contact us with your test profile and we will return a configuration recommendation and quote.