WLtoys K170 Main Shaft Set - Central Drive Assembly for UH-60L Black Hawk

The Core of Flight Stability and Smooth Transmission

The main shaft is the backbone of your helicopter's drivetrain; even a microscopic bend can cause the "Toilet Bowl Effect" (TBE) and premature gear wear. This WLtoys K170 Main Shaft set solves the problem of drivetrain vibration and erratic hovering. Replacing a stressed shaft restores the vertical alignment of the rotor head, ensuring your flight controller's gyro can stabilize the aircraft with surgical precision. Ships worldwide.

Product Highlights

• High-Rigidity Steel: Engineered to maintain perfect verticality even under the high torque of brushless maneuvers and heavy scale payloads.

• Pre-Drilled Precision: Features factory-aligned holes for the locking collar and main gear pin, ensuring perfect mechanical timing and fit.

• Low-Friction Surface: Polished finish reduces drag within the main frame bearings, leading to cooler motor temperatures and longer battery life.

• Anti-Warping Design: Specifically heat-treated to resist the bending forces often encountered during hard landings or tip-overs.

Compatibility

For the WLtoys K170 UH-60L 4CH Brushless RC Helicopter only.
Full model page (specs & photos):
https://www.kidstoylover.com/en-us/products/wltoys-k170-uh-60l-2-4ghz-4ch-brushless-military-rc-helicopter

What’s in the Box

• 1 x Central Main Shaft Set

Install Tips

• Collar Adjustment: Ensure the locking collar is tightened so there is no vertical "play" (up and down movement) in the shaft, while still allowing it to spin freely.

• Gear Alignment: Line up the bottom hole with the main gear hub perfectly before inserting the pin to avoid stripping the plastic gear housing.

• Bearing Test: Slide the shaft through the frame bearings; if you feel any resistance or "grittiness," it’s time to clean or replace the bearings as well.

Support & Warranty

• Expert help to choose the right WLtoys K170 spare parts
• 3-month warranty on manufacturing defects
• Ships worldwide

Other Related Parts

Need gears, shafts, servos, LEDs, batteries and more? Browse the full WLtoys K170 spare parts collection:
https://www.kidstoylover.com/collections/wltoys-k170-rc-helicopter-spare-parts-accessories