KK86 Linear Module

When conventional modules exhibit vibration or accuracy deviations under heavy loads, the KK86 is your ultimate solution. As one of the largest and most rigid models in the KK series, the KK86 features an extra-wide 86mm U-shaped steel base and a large-diameter Ø20mm ball screw. Engineered for demanding industrial environments, it delivers tank-like stability while handling 50kg-80kg loads during high-speed reciprocating motion. This makes it the ideal foundation for constructing large gantry systems and heavy-duty handling manipulators.

Extreme Moment Capacity
Ø20mm Screw
Double Block Option
Industrial Durability
Gantry Beam

Precise Structural Analysis

Specifications And Drawings

Category	Parameter	Specification / Value
Basic Dimensions	Module Width	86 mm
	Module Height	46 mm (Rail Base) / 58 mm (With Block)
	Rail Type	High-Rigidity U-shaped Steel Rail
	Block Type	Standard / Double Block Config
Drive System	Drive Mechanism	Precision Ground Ball Screw
	Screw Diameter	Ø 20 mm
	Screw Lead Options	10 mm / 20 mm
	Max. Stroke Range	150 mm ~ 1380 mm (Customizable)
Performance	Accuracy Grade	Precision (P) / Normal (C)
	Repeatability	P: ±0.003 mm C: ±0.010 mm
	Max. Speed	Up to 1,600 mm/s (Depends on lead & stroke)
	Max. Acceleration	1.0 G (Standard)
Load Capacity	Basic Dynamic Load (Ca)	22,500 N ~ 38,000 N (Double Block)
	Basic Static Load (C0a)	35,000 N ~ 70,000 N (Double Block)
	Allowable Static Moment (Mr)	Rolling: 800 N•m ~ 1,800 N•m
	Allowable Static Moment (Mp)	Pitching: 350 N•m ~ 1,500 N•m
	Allowable Static Moment (My)	Yawing: 350 N•m ~ 1,500 N•m
Material & Environment	Main Body Material	High Carbon Steel
Material & Environment	Motor Compatibility	400W – 750W Servo Motor

Additional Information

In-Depth Analysis of KK86's Heavy-Duty Mechanical Aesthetics

In the world of precision modules, if KK40 is the nimble assassin, then KK86 is the berserker clad in heavy armor.

When confronted with loads exceeding 50kg, many engineers face a dilemma: should they force two KK60s into parallel operation? Or simply deploy a single KK86?

From a structural mechanics perspective, the KK86 represents more than just a dimensional upgrade—it signifies a physics breakthrough in rigidity and critical load capacity.

The “Cubic-Level” Victory in Section Inertia

Rigidity does not scale linearly with material width but follows a near-cubic relationship.
The KK86’s base width measures 86mm—approximately 43% wider than the KK60. Yet in section inertia, the core metric for bending resistance, the KK86 achieves exponential improvement.
This means that when suspending the same weight on the KK86, the microscopic deformation of its guide rail may be only a fraction of that seen on the KK60. For equipment demanding micrometer-level precision, this “rock-solid” geometric rigidity represents a physical advantage that no control algorithm can compensate for.

Reduced Hertzian Contact Stress

Why choose a larger module for heavy loads? It’s not just about appearance.
The KK86 incorporates larger-diameter steel balls internally. Under identical loads, these larger balls create a greater contact area (contact ellipse) with the rail.
According to Hertzian contact theory, a larger contact area reduces the contact stress per unit area.

Small modules under heavy loads: Excessive contact stress causes balls to carve into the raceway like sharp blades, drastically reducing lifespan.
KK86 under heavy loads: Stress is dispersed, the raceway “feels” relaxed, and rated lifespan (L10 Life) naturally extends significantly.

Breaking the “Speed Lock” of Long Strokes: Ø20mm Lead Screws

Engineers designing long-stroke systems know the pain of “critical rotational speed.”
When lead screw length exceeds 1 meter, smaller diameters must drastically reduce speed to avoid resonant vibration, leading to inefficient equipment.
The KK86’s standard Ø20mm lead screw boasts approximately 2.4 times the sectional rigidity of a Ø16mm lead screw.
This robust shaft core significantly elevates the screw’s natural frequency. Consequently, even at 1.2m or 1.4m strokes, the KK86 confidently operates at high speeds. It stands as the optimal solution among single-axis modules, masterfully balancing “long stroke” and “high speed.”

Conclusion

The value of KK86 lies in its provision of substantial rigidity redundancy and dynamic redundancy. If you require high-quality, high-rigidity KK86 linear modules, feel free to consult our engineers. Our product quality will undoubtedly satisfy your needs!

Interested in this device?

Our engineers are ready to provide you with consulting services.

We promise to keep your information strictly confidential

FAQ

Why does the KK86 use a Ø20mm screw instead of the Ø16mm found in smaller modules?

The Ø20mm screw is critical for two reasons: Load and Speed. A thicker screw can handle significantly higher axial thrust without buckling. More importantly, for long strokes (over 1000mm), the thicker shaft raises the "critical speed" threshold, allowing the KK86 to run faster than smaller modules without encountering screw resonance or "whipping."

Can KK86 handle a payload of 100kg?

In a horizontal setup with a double-block configuration, KK86 can handle 100kg, provided the speed and acceleration are moderate. However, for vertical applications or high-dynamic moves, we recommend checking the "Moment of Inertia" and motor torque. Please consult our engineering team for a specific life calculation based on your duty cycle.

What motor flange options are available for KK86?

Standard flanges are available for 400W and 750W AC Servo Motors (e.g., Mitsubishi, Yaskawa, Panasonic, Delta). We can also provide flanges for NEMA 34 stepper motors, though servos are strongly recommended to maximize the performance of this heavy-duty module.

Is the KK86 suitable for single-axis gantry usage?

Yes. The KK86's U-shaped steel base is so rigid that it often eliminates the need for an external aluminum support profile for spans under 1 meter. It acts as its own structural beam, saving space and cost in gantry designs.