APEC SKM Series – 5-Axis High Speed Moving Gantry Machining Centers

The APEC SKM Series 5-Axis High Speed Gantry Machining Centers are engineered for high-precision mold & die machining and advanced aerospace aluminum components. Featuring a box-in-box symmetrical structure, dual linear motors on all three axes, and a honeycomb ram for vibration damping, the SKM Series achieves the rigidity, accuracy, and surface quality required for intricate molds and thin-walled aerospace structures.

Benefits for Mold & Die and Aerospace Machining

The SKM Series is designed to meet the demands of mold manufacturers producing complex cavity molds and precision dies, while also serving Tier 1–3 aerospace suppliers machining thin-walled aluminum parts. Its box-in-box structure minimizes deflection and thermal deformation, while the honeycomb ram design suppresses vibration during high-speed cutting. With high-speed spindles optimized for aluminum, advanced chip evacuation systems, and flexible head exchange options, the SKM Series consistently delivers ultra-fine surface finishes and dimensional accuracy across industries.

Compare the SK and SKM Series

  • Ultra-fine finishes ideal for mold cavities and die surfaces
  • Box-in-box design ensures rigidity, balance, and thermal stability
  • Dual linear motors on all axes provide chatter-free, high-speed precision
  • Honeycomb ram construction minimizes vibration for long-cycle accuracy
  • Aerospace aluminum machining capability for frames, ribs, and fuselage parts

Key Features

  • Box-in-box symmetrical crossbeam and saddle structure for rigidity and stability
  • Dual linear motor drives on X/Y/Z axes for high-speed motion and micron-level positioning
  • Honeycomb ram design with unequal thickness walls for superior vibration control
  • High-speed spindle optimized for aluminum alloys and mold finishing
  • Automatic head exchange system for machining angled or confined features
  • Crossbeam flushing with high-pressure nozzles and dual-chip evacuation with large-capacity tank
  • Movable beam roof cover prevents chip and coolant spread for a clean, safe environment

Ideal Cutting Applications

  • Precision molds and dies requiring ultra-fine surface finishes and high accuracy
  • Aerospace aluminum alloy structures: wing ribs, spars, fuselage panels, bulkheads
  • Thin-walled parts demanding stable, chatter-free machining
  • Large contoured surfaces requiring simultaneous 5-axis machining
  • High-volume production environments needing thermal stability and consistency

Specifications

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Item / Model
SKM2740/50/60/80 Request a Quote
SKM3240/50/60/80 Request a Quote
SKM3740/50/60/80 Request a Quote

X-Axis

157.48″/196.85″/236.22″

157.48″/196.85″/236.22″

157.48″/196.85″/236.22″

Y-Axis

106.3″

125.98″

145.67″

Z-Axis

39.37″

39.37″

39.37″

Table Length

157.48″/196.85″/236.22″

157.48″/196.85″/236.22″

157.48″/196.85″/236.22″

Table Width

161.57 lbs/ft²

161.57 lbs/ft²

161.57lbs/ft²

Max Table Load

944/944/472 IPM

944/944/472 IPM

944/944/472 IPM

Rapid Traverse

XYZ=196.85’/min

XYZ=196.85’/min

XYZ=196.85’/min

X/Y/Z Axis Acceleration

16.40′-26.25’/sec²

16.40′-26.25’/sec²

16.40′-26.25’/sec²

Spindle Taper

HSK-63A

HSK-63A

HSK-63A

Spindle Speed

24,000 RPM

24,000 RPM

24,000 RPM

Spindle Power (S1/S6)

80.52/100.65 HP

80.52/100.65 HP

80.52/100.65 HP

Spindle Torque (S1/S6)

35.39/44.25 ft. lbs.

35.39/44.25 ft. lbs.

35.39/44.25 ft. lbs.

Recommended 2-Axis Head

Fork Type Milling Head

Fork Type Milling Head

Fork Type Milling Head

Swivel/Rotation Torque

B=879.77/1,456.16 ft. lbs. C=774.08/1,272.36 ft. lbs.

B=879.77/1,456.16 ft. lbs. C=774.08/1,272.36 ft. lbs.

B=879.77/1,456.16 ft. lbs. C=774.08/1,272.36 ft. lbs.

Swivel/Rotation Speed

B=C=30(cont)/60(max) RPM

B=C=30(cont)/60(max) RPM

B=C=30(cont)/60(max) RPM

Swivel/Rotation Angle

HSK63A：B=±120° C=±360°

HSK63A：B=±120° C=±360°

HSK63A：B=±120° C=±360°

Clamping Torque

B=4,000 ft. lbs. C=4,000 ft. lbs.

B=4,000 ft. lbs. C=4,000 ft. lbs.

B=4,000 ft. lbs. C=4,000 ft. lbs.

Tool shank

30T pieces

30T pieces

30T pieces

Max Tool Length

11.81″

11.81″

11.81″

Max Tool Diameter with Adjacent Tool

Ø3.94″

Ø3.94″

Ø3.94″

Max Tool Diameter without Adjacent Tool

Ø5.12″

Ø5.12″

Ø5.12″

Weight

114,640 – 436,520 lbs.

114,640 – 436,520 lbs.

114,640 – 436,520 lbs.

Category

APEC SK Series

APEC SKM Series

Core Function

High-speed 5-axis gantry machining center optimized for aerospace aluminum structural parts

Multi-purpose 5-axis gantry machining center designed for mold & die machining with secondary aerospace capability

Structural Design

U-shape gantry structure with world’s lowest gravity center for maximum stability

Box-in-box symmetrical design with honeycomb ram for extreme rigidity, vibration damping, and thermal stability

Best For

Aerospace aluminum alloys, thin-wall structures, high-speed contouring

Mold & die machining (steel, graphite, precision dies) plus aerospace aluminum alloy components

Spindle

High-speed spindle (optimized for aluminum cutting, up to 24,000 rpm)

High-speed spindle options with enhanced rigidity and stability for long-cycle mold cutting

Table Design

Large-format table with dual-drive support for long aerospace components

Same concept, engineered to handle both aerospace parts and heavy mold bases

Automation

Compatible with pallet changers, probing, and adaptive control for aerospace work

Same automation options, but optimized for extended mold machining cycles

Highlight Advantage

Accuracy at speed — aerospace machining with ultra-fine finishes and stability

Versatility — equally capable in mold & die and aerospace aluminum machining