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Cascading X-Rail Slide Kit

  • Shown with <a href="/hs-785hb-servo">HS-785HB servo</a>
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We've received such high demand for this new kit that it sold out while in pre-order! So we took advantage of the power of our modular build system to R&D an alternate version that uses different parts so you don't have to wait for the original to come back in stock. This limited time special edition is functionally the same as the original, the most notable difference is that it uses Standard V-Wheels instead of Mini V-Wheels. As always, let us know if you have any questions by reaching out to us at [email protected] or 620.221.0123.
- Team ServoCity

The Cascading X-Rail Slide Kit provides all the mechanical pieces necessary to build a winch-driven extendable arm.  Fasten a motor or HS-785HB servo to the first stage of the slide kit and spool up the provided synthetic cable to get up to 34.5" of arm extension!  This kit uses bearings throughout - each stage is supported by Standard V-Wheels that lock into the chamfered guides of the X-Rail.  The synthetic cable is routed over ultra smooth v-bearings so the torque provided by the servo or motor can be transformed into linear thrust rather than lost due to friction.  The arm, at full extension is rated for a 2lb load; perfect for adding a gripper or grapple hook.


SKU Description Qty
565050 13.50" Actobotics® X-Rail 4
4mm ID x 13mm OD V-Groove Ball Bearing 5
545406 Bottom Tapped Pattern Mount D 5
585758 V-Wheel Plate 3
18 mm x M4 Zinc-Plated Button Head Cap Screw  5
M4 x 0.7 Nylock Nuts 5
615452 V-Wheel with Ball Bearings 12
97763A141 6-32 x 1/4" Button Head Cap Screw 12
632106 0.250" 6-32 Zinc-Plated Socket Head Machine Screw 25
632110 0.375" 6-32 Zinc-Plated Socket Head Machine Screw 25
632118 0.625" 6-32 Zinc-Plated Socket Head Machine Screw 25
632120 0.750" 6-32 Zinc-Plated Socket Head Machine Screw 25
633164 0.250" Length, 1/4" OD Aluminum Spacer for #6 Screw Size (0.140” ID) 12
633175 V-Wheel Standoff A 12
585757 X-Rail Screw Plate 4
Oval End Cap with 'T' 2
Oval End Cap without 'T' 2
Round End Cap with 'T' 1
Round End Cap without 'T' 3
V-Bearing Bracket 10
2907-0001-0002 5mm Diameter Latex Surgical Tubing (2 meters) 1
2908-0001-0005 200lb Tensile Strength Green Synthetic Cable (5 meters) 1
Product Weight 1.41 lbs
Maximum Payload 2lbs

To drive this kit with a servo we recommend these parts:

  • HS-785HB servo
  • 0.3125" 6-32 Zinc-Plated Pan Head Phillips Machine Screw (90272A145)
  • Large Servo Plate A (575116)
  • Servo Winch Pulley (56314)
  • 0.250" 6-32 Zinc-Plated Socket Head Machine Screw (632106)
  • X-Rail Surface Adaptor Bracket (585072)
  • Single X-Rail Mount (585717)
  • 90° Dual Side Mount A (585470)

To drive this kit with a motor we recommend these parts:

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