NEW PRODUCTS ■ HARDWARE ■ SOFTWARE ■ GADGETS ■ TOOLS
20 October 2015
HS-785HB
GEAR RACK KIT
The 785 Gear Rack Kit available from ServoCity is a simple way to create linear motion using a rotational
servo. The kit comes with the multi-rotation Hitec HS-
785HB servo which allows for up to 9. 6” of travel when
sending the proper PWM signal from a servo controller.
The kit is constructed of 6061 T6 aluminum components
and wear-resistant Delrin plastic to create a durable yet
lightweight assembly. The framework has several mounting
options and integrates seamlessly with the rest of the
Actobotics line of products. The 785 Gear Rack Kit is
great for steering racks and other applications that require
linear motion using a PWM signal. The HS-785HB servo
rotates approximately 1.7 degrees/microsecond change in
signal. To achieve full travel, a signal range from
approximately 850-2150 µsec will be required (each HS-
785HB servo responds to a signal slightly differently, so
you may need to fine-tune this range in order to achieve
full travel without hitting the stops at the ends). On a
standard RC transmitter and receiver (assuming a 1050-
1950 µsec range) the Gear Rack Kit will travel
approximately 6. 7”. It is priced at $89.99.
HS-785HB
CHANNEL SLIDER KIT
The HS-785HB Channel Slider Kit from ServoCity also provides an excellent way to create linear motion
using a rotational servo. The unique Hitec HS-785HB
servo (included in the kit) can rotate multiple turns while
retaining positioning feedback which makes it perfect for
this type of application. The XL timing belt and XL pulleys
offer a reliable way to transfer the rotation of the servo
into a smooth linear
motion down the 24”
channel backbone.
Total usable travel is
approximately 19. 25”
and the rate of travel
is . 47”/second while
running on 6V.
Whether you’re
building a replica, a
pick-and-place
machine, or a
telescoping arm, this
kit can help put your
