BSx4S-one10 Grasper2 DRIFT SPEC

No. 30218
End of production


#Maximum Torque: 16.0Kg-cm Maximum Speed: 0.09sec/60deg(@7.4V)
#Maximum Torque: 12.1Kg-cm Maximum Speed: 0.11sec/60deg(@6.0V)

#Dimensions: 40.5×26×21mm (Low Profile)
#Weight: 51.0g
#Servo Lead: 180mm
#Operating voltage: 6.0~7.4V (Lipo, Life, Ni-MH)
#Brush-less motor
#Hard alumite aluminum gear
#Dual ball bearings
#Hard servo gear shaft
#Aluminum top case
#Aluminum heat sink middle case
#Black cable
#Gold plated connector
#Serial Compatible
#HCS Compatible

#Recommend category
 1/10 EP Drift car   

*1 The preset of drift may not output the maximum torque and maximum speed because the optimum parameters are set for drift driving but can be changed with programming.

*This servo may be had servo's vibration by the installed car's structure and assembly. Also, the same vibration may occur during the period of use or situation of use.

Made in Japan.

  • 5 patterns of presets available

    Five presets are installed in the model memory of the Grasper2. You can use them properly according to the machine and road surface. Please use the servo model selector to switch the servo function that can handle various situations with one servo.


    Model 1: High under steering setting
    Model 2: Low under steering setting(Factory default)
    Model 3: Neutral

    Model 4: Low over steering setting
    Model 5: High over steering setting

    * Since the holding power of the 4th and 5th settings is very strong, a creaking noise will be heard when in neutral, but this is not a malfunction.


    If you use telemetry function by the EX-NEXT, you can change parameter by transmitter menu. Or if other transmitter using, please use "Servo Model Selector for 4S" to switch models.
    * The conventional servo model selector (No.61029) cannot be used.
    *If you are using Gyro unit  (ex KG-X), telemetry function cannot be used. please use "Servo Model Selector for 4S".


    ・Factory Default setting data

    STRETCH1 42 52 32 30 20
    STRETCH2 65 75 55 50 40
    SPEED 70 70 78 65 65
    PUNCH 0 0 0 0 0
    DEAD BAND 0 0 0 0 0
    DANPING 5 5 5 5 5
    FREQUENCY x8 x8 x64 x16 x16


    ・Model Setting Sheet

    Bsx4S-one10 Grasper 2 DRIFT SPEC is able to change parameter by EX-NEXT.
    Please download and use the setting sheet after download.



    Grasper's unique holding power as like grasping the road has been further strengthened​​

    Today's RC cars have evolved and their marginal performance has improved. As a result, some drivers may find that conventional servos are not enough. The new product BSx4 Sone10 Grasper2 has been redesigned from the built-in brushless motor to improve torque and holding power.
    Grasper's greatest feature, "grasping the road" servo performance has been further enhanced. Even on the latest high-end machines, the Grasser 2 has enough holdingpower. (recommend for 1/10 category)


    What is holding power

    The holding force is the force that the servo shaft tries to hold a position. Grasper has meanings such as "grasping tightly" and "grasping firmly", and is a name that expresses the characteristics of this servo that firmly captures the road surface.


    ■Torque increased by 150% compared to conventional models

    The torque of the conventional BSx3-one10 Grasper was 10.8Kg-cm (at 7.4V), but with the new Grasper2, the torque has been improved to 16.0Kg-cm. This achieved about 150% increase compared to the conventional model. Torque increased by 150% compared to conventional models.



    ■Implemented a "4S" system that supports serial

    The "4S" servo supports serial. By supporting serial, there are the following merits.

    (1) Ultra-high-speed communication dramatically improves response.

    The PWM method is the mainstream control method for RC servos. In the PWM method, the angle is specified by the width of the signal transmitted from the receiver. On the other hand, in serial communication, the servo angle can be specified numerically. In serial communication, the communication interval can be significantly shortened compared to the PWM method, and the interval from command to operation is greatly reduced. By combining with EX-NEXT's XT mode, we have achieved an unprecedented ultra-fast response as if you were just touching the machine.   

    (2) Servo parameters can be changed from the radio at hand

     The next-generation radio "EX-NEXT" is equipped with a telemetry (two-way communication) function."REAL TIME ICS" can be used by connecting the serial compatible servo "4S" to the B / S port mounted from the new receiver KR-420XT. Servo parameters can be set arbitrarily from the radio without having to collect the machine at hand. It's easier than ever to create a more flexible and in-depth settings without compromise.

    *When using serial, connect to the B / S port of the KR-420XT in XT mode of EX-NEXT.

    *When a gyro unit is relayed between the servo and receiver, such as KG-X, serial communication is not supported.


    ■Added "Frequency" as a new parameter

    Grasper2 can change various characteristics to your liking by ICS, but "Frequency (FREQUENCY)" has been newly added from 4S. "Frequency" is a function to change the frequency of the motor built into the servo. By changing the frequency, the servoActivity changes. Direct feeling improves by lowering the frequency. The servo operation becomes active and the machine will bend sharply. The higher the frequency, the smoother the servo will move. The activity will be calm and you will be able to bend smoothly. Please select your favorite characteristics while changing the settings.


    ■Compatible with conventional systems (PWM)

    It can also be used in HCS, which has been well received, and in normal mode, which can be used for a wide range of models.


    The communication processing time between the receiver and the servo is compressed to 1/4, and it can be used with a direct operation feeling.


    [Normal mode]

    System used for servos and ESC’s that has been adopted for many years. It can be used with many receivers.


    The modes you can select on your servo depend on the transmitter and receiver you are using. Please refer to the table below.


    ■Serial / HCS / normal mode switching method.

    The servo automatically switches depending on the port connected to the receiver and the mode setting. No additional options are required for mode setting. If you want to use it serially, connect it to the B / S port of KR-420XT. Also, when using with HCS, it can be used simply by connecting to channels 1 to 4 set in HCS. The same applies to normal mode. Of course, it can also be used with the KR-418FH and other receivers that have been released so far. * Only KR-420XT can be used for serial mode. For conventional receivers, use HCS or normal mode.


    ■Tight black and silver new color aluminum top case

    An aluminum case is used for the top case that supports the [holding power] that does not shake. By further cutting after alumite treatment, a sharp form with an edge is created (chamfering). Furthermore, by cutting the inner thickness to the utmost limit, it is lighter than the conventional aluminum case while ensuring sufficient strength.


    Easy-to-manage black servo wire

    Commitment extends to servo leads. The black cable, which looks tight, has the optimum softness for handling while ensuring the required current capacity.


    [Related Product]

    By changing bottom case "Reverse lead bottom case (for Grasper2)"(sold separately) of "BSx4s-one10 Grasper2" can be reversing the lead wire out direction, wiring such as touring cars can be neatly organized. Due to the heat sink effect, the heat of the FET can be efficiently dissipated.



    LCD Xpansion unit 2 Parameters can be changed from EXP-201

    You can connect a servo to the Xpansion and set the characteristics to your liking by operating the Xpansion buttons. Compatible servos are all models equipped with ICS. Of course, it also supports Grasper2.




    * A separate power supply (6 to 7.4V) and twin extension wire cord are required. * This product does not support parameter changes by the servo manager connected to a PC.


    Please be careful

    There may be slight vibration under no load, but this is not a malfunction. This servo sets the parameters to optimize the driving condition. Therefore, when viewed with the servo alone, the output shaft may generate slight vibrations or drive noise, but this is not an abnormality and does not interfere with operation.


    Servo x1
    Grommet x4
    Screw for Horn x1

  • Reverse lead bottom case (for Grasper2)

    End of production
    No. 35047


    No. 30137

    BSx4S-one10 Grasper2 DRIFT SPEC w/selector4s

    End of production
    No. 30219
  • Servo

    Servo Fitting Chart
    Fitting chart for various KO Servo.