Woodworking Machines > Planer Moulders & 4-sided Planers > Soukup Fourside Planer & Moulder GS-423, GS-523

Soukup fourside planer and moulder machine with open guard, blue spindle units, dust extraction hoses and side control panel

Close-up of blue Soukup fourside planer and moulder machine showing serrated cutter heads and danger warning labels

Close-up of a Soukup fourside planer and moulder spindle head with rotating cutter block and feed roller assembly

Soukup Fourside Planer & Moulder GS-423, GS-523

Soukup

A solid entry into four-side processing for medium-scale joinery and timber production — plane and profile all four faces in a single pass, with the flexibility to specify 4, 5, or 6 spindles to match your most common profiles.

Typically chosen by

Joinery shops stepping up to four-side processing in a single pass to reduce handling time between operations
Timber merchants and moulding producers running medium-volume profiled sections who need repeatable finish quality
Workshops processing a mixed range of section sizes who want the flexibility of variable feed speed and independent spindle adjustment

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Key specification considerations

Spindle Configuration

4, 5, or 6 spindles (GS-423 / GS-523)

The number of spindles determines how complex a profile you can complete in a single pass — more spindles reduce the need for secondary operations or re-runs.

Feed Speed

Variable (contact IWM for range)

Variable feed allows you to slow down for hardwoods or intricate profiles and increase throughput on straightforward sections — important for workshops processing mixed species.

Spindle Setup

Digital readout

Digital readout on spindle positioning speeds up changeovers and reduces the risk of setup error when switching between section profiles.

Construction

Ribbed cast iron frame

See full specifications

Specification	Value	Notes
Model Variants	GS-423, GS-523
Spindle Configuration	4, 5, or 6 spindles
Spindle Adjustment	Vertical and horizontal, with digital readout
Thickness Spindle	Adjustable independently of the feeder	Independent thickness adjustment means you can fine-tune the top face without disturbing your feed settings — useful when switching between slightly different stock sizes.
Feed System	Variable speed, steel and rubber wheels under pneumatic pressure	Pneumatic pressure on the feed wheels maintains consistent grip across varying workpiece widths, which matters when feeding short or narrow sections.
Workpiece Support	Side front pressure plate on left vertical spindle; powered roller after 4th spindle	The side pressure plate is specifically designed to support short or narrow workpieces that would otherwise be prone to movement or kickback at the infeed.
Working Table	Chromed
Construction	Cast iron
Air Pressure System	Centralised regulation	A centralised air pressure system means a single point of adjustment for the pneumatic feed — check that your workshop has a suitable compressed air supply before installation.
Lubrication	Centralised lubrication system
Control Layout	All spindle control levers at front of machine
Safety Guarding	Comprehensive safety guards fitted
Certification	CE certified
Motor Power	Contact IWM for configuration details	Four-side moulders of this class typically require a three-phase supply — confirm total connected load and phase requirement with IWM before ordering.
Working Width (max)	Contact IWM for details
Working Height (max)	Contact IWM for details
Minimum Workpiece Length	Contact IWM for details
Spindle Speed	Contact IWM for details
Feed Speed Range	Variable — contact IWM for details
Machine Dimensions	Contact IWM for details	Allow additional clearance at infeed and outfeed ends for workpiece length, plus access for the operator — four-side moulders typically require more floor space than the machine footprint alone.
Machine Weight	Contact IWM for details	If weight exceeds 500 kg, floor loading capacity should be verified before installation.
Noise Level	Contact IWM for details

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Is this the right
machine for you?

Choose the Soukup Fourside Planer & Moulder GS-423, GS-523 if...

You need four-side planing and moulding in a single pass at medium production volumes and want a cost-effective entry into this class of machine
You want the flexibility to specify 4, 5, or 6 spindles to match the complexity of your most common profiles
Digital spindle readout and centralised controls are important for reducing changeover time and operator error in a busy production environment
You regularly process short or narrow sections and need positive feed control to handle them safely

Consider an alternate model if...

You need heavier-duty, higher-volume throughput — the GN-5S23 or GN-6S23 may be more appropriate for sustained industrial production rates
Your maximum workpiece width exceeds what the GS series accommodates — the GL-645 handles up to 450 mm width and may better suit larger section sizes
Your profiling requirements are simpler and a dedicated moulder without full four-side planing is sufficient — the GH-623 or GL-630 Moulder may be a more cost-effective fit
You are processing at lower volumes or smaller sections where the Four-Sided Planer Model 180 PSE may be a better-matched specification — talk to us and we can advise

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