Repeat Mini Mk4

$18.00 - $39.00

Does your antweight suffer from a lack of drive power? Have you stripped the gearboxes on your drive motors leaving your bot stranded in the arena? I too have suffered from these problems. That's why I started developing the first off-the-shelf 16mm brushless gearmotors to be sold to combat robot builders. Repeat drive mini Mk4 is the upgraded version of my game-changing brushless gearmotors, featuring a custom wound 1106 brushless motor coupled to a two stage, 28.5:1, all metal, 16mm planetary gearbox. These motors will empower you to drive circles around your competition... literally. Not sold on these motor's power output? The reigning NHRL 3lb champion Repeater runs the mk3 version of these motors!

Motor Type: Gearmotor
Shaft Size: 3mm
Gearbox Ratio: 28.5:1 Drive
$35.00
$35.00
Availability: In stock
Repeat RoboticsRepeat Mini Brushed Mk2 (1pcs)
Repeat Mini Brushed Mk2 (1pcs)
Repeat Compact 1806
Repeat RoboticsRepeat Compact 1806
$35.00
$35.00
Note: Price is for one motor

Features:

  • 1106 3500kv custom brushless motor
  • 2s-4s rated voltage
  • 16mm, 28.5:1 or 10 all metal planetary gearbox
  • 3mm or 4mm "D" extra long output shaft (can be cut to length)
  • 28.5:1 Drive with 3mm shaft - 23.9g
  • 28.5:1 Drive with 4mm shaft - 24.7g
  • 107:1 HR with 3mm shaft - 27.3g
  • 107:1 HR with 4mm shaft - 28.3g
  • ~23g weight with 3mm shaft (can lower the weight by cutting down the shaft and shortening the wires)
  • ~24g weight with 4mm shaft (can lower the weight by cutting down the shaft and shortening the wires)
  • ~28mm body length for Drive ratio
  • ~31mm body length for HR ratio
  • 10.5mm M2 Face mount hole pattern
  • Comes ready for combat, just solder the motor leads to a brushless ESC and you're on your way (Soldering iron required)
Find the 3D Model here: https://grabcad.com/library/repeat-mini-mk4-1

Improvements vs Mk3 design:

  • 1204 was changed to a 1106 for more stator volume and more outrunner clearance
  • Output shaft is made from hardened 4130 steel, to improve lifetime and is integrated into the carrier plate, to improve durability.
  • Output shaft is retained without the use of a circlip, eliminating the main failure mode and improving the durability
  • Further changed the wire retention with stronger stator winding wires and mechanical clamping of the wires at the stator base.
  • Gearbox baseplate is integrated into the brushless motor base, removing screws and additional points of failure.
Disclaimers: These gearboxes can only accept ~2mm of face screw engagement. Using screws that are too long will result in damage.
These motors are being used in combat, where anything might happen. I am unable to accept returns for battle damaged products.