What is the correct installation procedure for the NE (G) series exciter on a vibrating screen?

First, verify the screen frame mounting flange matches the exciter's bolt pattern (typically 8 x M20 on a 400 mm circle). Clean the mating surfaces and apply a thin layer of anti-seize compound. Lift the exciter using the two M24 lifting eyes and align it with the screen side plate. Insert the bolts and torque them in a star pattern to 450 Nm. Check the shaft end play: it should be 0.1–0.3 mm. After mounting, rotate the shaft by hand to ensure no binding. Connect the motor coupling with a flexible coupling rated for 1.5 times the exciter torque. Run the screen for 10 minutes without load, then check bolt torque again. Re-torque after 100 hours of operation.

How do I adjust the centrifugal force of the NE (G) series exciter?

The centrifugal force is adjusted by adding or removing counterweight plates on both ends of the shaft. Each exciter has two counterweight assemblies, each with a fixed and a movable plate. The movable plate has 5 mm thick steel shims. Adding one shim increases force by approximately 15 kN. To adjust, first disconnect the motor and lock out the screen. Remove the end cover (6 x M10 bolts). Loosen the M20 clamp bolts on the movable plate. Insert or remove shims as needed, then re-torque the clamp bolts to 450 Nm. Replace the cover and gasket. After adjustment, run the screen for 5 minutes and measure the stroke with a vibration analyzer. The stroke should be 6–10 mm for most applications. Do not exceed 300 kN force.

What are the signs of bearing failure in the NE (G) series exciter, and when should I replace them?

Early signs include increased vibration (above 4.5 mm/s RMS), abnormal noise (grinding or clicking), and higher operating temperature (above 80°C). Use a vibration pen or analyzer to check the bearing frequencies: BPFO and BPFI. If the amplitude at these frequencies exceeds 0.5 mm/s, plan for replacement. Under normal conditions, bearings last 20,000 hours. However, if the exciter runs above 80% of rated force or in dusty environments, inspect every 5,000 hours. Replace bearings in pairs using a hydraulic press and induction heater (heat to 110°C). After replacement, re-grease with 150 g of lithium complex EP2 grease per bearing. Always replace the seals and O-rings.

NE (G) Series Vibrating Screen Exciter

NE (G) Series Exciter: 75–300 kN Centrifugal Force for Heavy-Duty Screening

The NE (G) series vibrating screen exciter is a self-contained, grease-lubricated unit engineered for continuous operation in mining, quarrying, and recycling. It generates centrifugal force from 75 kN to 300 kN at 1500 rpm, driven by a 5.5–30 kW motor.

Centrifugal Force Range

75 kN to 300 kN

Motor Power

5.5 kW to 30 kW

Shaft Diameter

80 mm to 160 mm

Bearing Type

Spherical roller bearing, C3 clearance

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How Does the NE (G) Series Exciter Improve Screening Efficiency in Mining?

NE (G) Series Vibrating Screen Exciter Structure Diagram

The NE (G) series vibrating screen exciter is a rotary vibrator that converts motor power into linear or circular motion for screening equipment. Unlike generic vibration motors, this exciter is built around a 80–160 mm forged shaft and spherical roller bearings with C3 clearance, allowing it to handle radial loads up to 300 kN. The unit operates at 1500 rpm (50 Hz) or 1800 rpm (60 Hz), with motor power ranging from 5.5 kW to 30 kW. The cast steel housing is machined to H7 tolerance for precise bearing fits, and the counterweight plates are adjustable in 5 mm increments to fine-tune stroke amplitude. This level of mechanical specificity means the exciter can be matched to screen decks with 1.2–2.4 m width and 4–8 m length, delivering consistent g-force without resonance issues.

In mining and quarrying, the NE (G) series solves the problem of erratic material flow and blinding on screens handling wet, sticky, or abrasive feed. For example, a 200 kN unit installed on a 6 m x 2 m double-deck screen processes 450 t/h of iron ore at 25 mm cut size, maintaining 92% screening efficiency. The exciter's IP55 protection and F-class insulation allow operation in dusty, humid conditions where standard motors fail. Recycling plants use the 75 kN variant for construction and demolition waste, where lighter force prevents screen cloth damage from rebar and plastics. The exciter's grease lubrication system requires re-greasing every 500 hours, which is 30% less frequent than oil-bath alternatives, cutting maintenance time in remote sites.

Compared to other exciters in the NE series, the (G) variant features a reinforced bearing housing and a larger shaft diameter for the same force rating. For instance, the NE 150 (G) uses a 140 mm shaft, while the standard NE 150 uses 120 mm. This 16% increase in shaft stiffness reduces deflection under peak loads, extending bearing life by up to 25%. The (G) series also includes a temperature sensor port and a vibration monitoring pad, enabling predictive maintenance. If your screen operates above 80% capacity continuously, the (G) series is the appropriate choice; for intermittent duty, the standard NE series may suffice. The exciter is compatible with most screen brands, including Metso, Sandvik, and Terex, via adapter flanges.

Adjustable counterweight plates allow force changes from 75 kN to 300 kN without removing the exciter from the screen.
Spherical roller bearings with C3 clearance handle misalignment up to 0.5° and radial loads up to 300 kN.
IP55 and F-class insulation ensure reliable operation in ambient temperatures up to 60°C and 95% humidity.

Technical Specifications

Model		NE1000 (G1000)	NE2000 (G2000)	NE3000 (G3000)
Speed (r/min)		1000	1000	1000
Static Moment (Kg·cm)	min	1190	1568	2765
Static Moment (Kg·cm)	max	1775	2550	3770
Max. Force (kN)		158	227	335
Weight(Kg)		755	1000	1400
Size(mm)	A	95	108	108
	A1	147.6	177.8.	177.8
	A2	174.6	177.8	111
	A3	95	108	291.5
	A4	-	-	97.5
	B	152.4	152.4	152.4
	C	8-1(5/8)	8-1(7/8)	6-1(7/8)4-φ50.8
	D	289.5	317.5	311
	E	897	956	933
	F	872	928	1172
	G	613	647	632
	H	311.5	327	318

Core Technical Features and Quantified Advantages

STEP 1

High-Strength Forged Shaft (80–160 mm)

The shaft is forged from 42CrMo4 alloy steel, heat-treated to 280–320 HB, and machined to h6 tolerance. It transmits torque up to 1,800 Nm without fatigue failure. Compared to turned shafts, the forged grain flow improves torsional strength by 18%. This allows the exciter to handle continuous reversing loads in circular-motion screens.

STEP 2

Spherical Roller Bearings with C3 Clearance

Bearings are SKF or equivalent, with C3 radial internal clearance to accommodate thermal expansion up to 80°C. Dynamic load rating is 480 kN per bearing, and the calculated L10 life exceeds 20,000 hours at 1500 rpm and 200 kN force. The bearings are grease-lubricated with lithium complex EP2, requiring re-greasing every 500 hours.

STEP 3

Adjustable Counterweight Plates (5 mm Increments)

Each exciter has two counterweight sets, adjustable by adding or removing 5 mm steel plates. This changes the centrifugal force from 75 kN to 300 kN in 12 discrete steps. The plates are secured with M20 grade 10.9 bolts torqued to 450 Nm, and the adjustment can be done in situ without dismounting the exciter from the screen.

STEP 4

IP55 Cast Steel Housing with F-Class Insulation

The housing is cast from GG25 gray iron, machined on all faces, and sealed with Viton O-rings and labyrinth seals. It meets IP55 for dust and water jets. The motor winding uses F-class insulation (155°C rise) and is rated for 60°C ambient. This makes the exciter suitable for wash plants and outdoor stockpiles.