Anycubic SP Kobra 3 max/combo Hotbed

The Anycubic Kobra 3 Series / Kobra 3 Max Heated Bed Assembly (Hotbed): is the primary thermal build surface platform responsible for maintaining consistent temperature distribution across the print plate to prevent first-layer warping and adhesion failures. It consists of an aluminum alloy heat-spreader plate integrated with a high-power AC/DC heating trace element, integrated bed thermistor sensor wiring, thermal insulation backing, and a flexible magnetic sheet base.
Rapid Uniform Thermal Heating: Engineered with high-density trace routing to heat from room temperature up to 100°C rapidly and evenly across the entire active printing area.
Pre-Applied Magnetic Base: Features a high-temperature magnetic sticker pre-laminated onto the aluminum sub-plate, ensuring strong magnetic pull for PEI spring steel build plates without shifting during high-acceleration motion (20,000 mm/s).
Bottom Thermal Insulation: Equipped with a bottom-mounted thermal insulation cotton layer that reduces radiant heat loss downward toward the electronics, improving energy efficiency and bed heating speed.
Heavy-Duty Strain-Relief Harness: Integrates a reinforced wire outlet sleeve at the rear connection to prevent wire fatigue, flexing stress, or short circuits during repeated Y-axis bed motion.

Technical Specifications

Compatible Models: Anycubic Kobra 3 / Kobra 3 Combo / Kobra 3 Max
Maximum Operating Temp: Up to 100°C
Operating Voltage: 24V DC / High-Output Heating Trace
Net Item Weight: ~1,150 g to 1,350 g (1.15 kg – 1.35 kg)
Gross Shipping Weight: ~1,600 g to 1,800 g (including heavy protective box)
Build Area Dimensions: 250 x 250 mm (Standard Kobra 3) / Extended size for Max variants.
Bed Assembly Dimensions: ~265 x 265 x 25 mm (L × W × H including mounting points & harness)
Packaging Dimensions: ~$310 x 300 x 60 mm
Materials: Precision-machined aluminum substrate, high-temp silicone wiring, magnetic polymer sheet.

Maintenance & Care Tips

Perform Auto-Bed Leveling (ABL) Post-Replacement: After mounting a replacement bed assembly, run the printer's automatic mesh bed leveling and Z-offset calibration routine to map out any minor micro-variations.
Bed PID Tuning: Execute a Bed PID Calibration from the maintenance menu to allow the printer's firmware to calibrate the duty cycle of the new heating element for tight temperature control.
Check Y-Axis Belt & V-Wheels/Rails: When swapping the hotbed, verify that the bed carriage screws are torqued evenly to avoid twisting the aluminum plate, which can cause unnatural bed tilt.

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