K-85X Full-Servo 850mm Remote-Controlled Planetary Concrete Floor Grinder Manufacturer

28 HP / 21.5 kW Full-Servo Grinding Motor

The defining feature of the K-85X is its full-servo main grinding motor.

Rated at 28 HP / 21.5 kW, it provides slightly higher peak power than the K-85 while also offering the operating characteristics associated with the servo-based platform.

For the K-85X, the key advantage is not simply the extra horsepower. The supplied documentation highlights responsive power delivery and stable low-speed operation, particularly for precision grinding applications.

Stable Low-Speed Precision Grinding

Certain floor processes require controlled movement and stable grinding action at relatively low machine speeds.

The K-85X servo system is specifically positioned for these conditions, including slurry-related work and dry-cast stone grinding.

This makes the K-85X particularly attractive for contractors whose project mix extends beyond aggressive concrete surface opening into more controlled finishing and specialty floor applications.

850mm Four-Head Planetary Grinding System

Four 298 mm grinding heads work within an 850 mm / 33 in planetary grinding path.

The wide working width is designed for high productivity across warehouses, factories, logistics facilities, large commercial interiors and other expansive floor areas.

Planetary motion creates overlapping tool paths that support controlled material removal and consistent floor treatment across the machine’s wide grinding path.

Full-Function Wireless Remote Control

The K-85X provides comprehensive wireless machine control.

Functions identified in the supplied documentation include:

• Grinding speed adjustment
• Travel speed adjustment
• Deviation correction
• S-curve travel
• One-key U-turn
• Eight-direction steering

Remote operation lets the contractor monitor floor condition and machine movement from a convenient position while reducing the need to continuously walk directly behind a 645 kg grinder.

Battery Backup System

Battery backup is exclusive to the K-85X within the K-85 family.

The technical documentation lists approximately 30 minutes of backup power following a sudden power failure.

This is particularly useful on professional sites where an unexpected power interruption could otherwise result in an abrupt machine stop during an active grinding operation.

Up to 425 kg Grinding Pressure

The K-85X provides up to 425 kg / 937 lb of grinding pressure, matching the heavy-duty capacity of the K-85.

This substantial downward tool pressure supports work on dense concrete, demanding surface-opening operations and floor renovation where aggressive diamond contact is required.

0-1,800 rpm Variable Tool Speed

The K-85X provides a broad 0-1,800 rpm tool-holder speed range.

Combining variable speed with the servo drive system allows operators to adapt the machine to aggressive grinding, controlled low-speed processing, surface refinement and polishing applications.

Reinforced Double-Layer Gearbox

The K-85X uses a double-layer thickened gearbox designed for strength, impact resistance and reduced chatter under heavy grinding loads.

A stable gearbox structure is particularly important for an 850 mm machine generating substantial grinding pressure across four large tool holders.

Three-Oil-Seal Design

Three oil seals are used around the relevant drive structure to improve sealing and reduce the risk of lubricant leakage.

The design is intended to improve long-term durability and reduce maintenance requirements during repeated industrial use.

Large 320mm Travel Wheels

Large 320 mm travel wheels provide greater contact area and stable machine movement.

The supplied documentation highlights their traction advantage during slurry-related operations, where smaller wheels may be more prone to slipping.

70mm External Dust Extraction Port

The K-85X includes a 70 mm / 2.76 in vacuum hose connection.

Connect the machine to an appropriately sized external industrial dust extractor for dust-controlled dry concrete grinding.

The K-85X does not have the integrated vacuum motor and filtration architecture used by models such as K58 or K-72, so I recommend describing this specifically as an external dust extractor connection, rather than calling the machine itself “dust-free.”

Water Feed Connection

A hose connection supports water feed for appropriate wet grinding and slurry applications.

Combined with the K-85X’s stable low-speed servo operation and large travel wheels, this is particularly useful for contractors working across both dry concrete preparation and specialty wet processes.