Data captured: · Published: · Update delayed: this release is over 8 days old.
Photograph of the part · from aifitlab.com
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1 / 1specs 30evidence [n]sources 2
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field · keyvaluesource sentencesourceEvidenceRetrieved · Changed
Rated voltagerated_voltage
valuemeasured at Reduction ratio 387:1
9.0-12.6V
source sentenceOperating Voltage 9.0-12.6V
sourcehttps://aifitlab.com/products/fashion-star-hx8-u51h-m-uart-bus-servo · Distributor page
EvidenceSourced
Retrieved · Changed2026-08-28Changed —
Stall torquestall_torque
valuemeasured at Rated voltage 9.0-12.6V · Reduction ratio 387:1
as printed 50kg-cm (4.90N·m)4.903 N·m
source sentenceStall Torque 50kg-cm (4.90N·m)
sourcehttps://aifitlab.com/products/fashion-star-hx8-u51h-m-uart-bus-servo · Distributor page
EvidenceSourced
Retrieved · Changed2026-08-28Changed —
No-load speedno_load_speed
valuemeasured at Rated voltage 9.0-12.6V · Reduction ratio 387:1
as printed 70.0rpm (0.151sec@60°)70 r/min
source sentenceNo-load Speed 70.0rpm (0.151sec@60°)
sourcehttps://aifitlab.com/products/fashion-star-hx8-u51h-m-uart-bus-servo · Distributor page
EvidenceSourced
Retrieved · Changed2026-08-28Changed —
Ambient temperatureambient_temperature
valuemeasured at Rated voltage 9.0-12.6V · Reduction ratio 387:1
-10 ~ 60°C
source sentenceOperating Temperature -10 ~ 60°C
sourcehttps://aifitlab.com/products/fashion-star-hx8-u51h-m-uart-bus-servo · Distributor page
EvidenceSourced
Retrieved · Changed2026-08-28Changed —
Stall currentstall_current
valuemeasured at Rated voltage 9.0-12.6V · Reduction ratio 387:1
as printed 5.5A5.5 A
source sentenceStall Current 5.5A
sourcehttps://aifitlab.com/products/fashion-star-hx8-u51h-m-uart-bus-servo · Distributor page
EvidenceSourced
Retrieved · Changed2026-08-28Changed —
Protocolprotocol
valuemeasured at Rated voltage 9.0-12.6V · Reduction ratio 387:1
UART/TTL
source sentenceCommunication Protocol UART/TTL
sourcehttps://aifitlab.com/products/fashion-star-hx8-u51h-m-uart-bus-servo · Distributor page
EvidenceSourced
Retrieved · Changed2026-08-28Changed —
Baud ratebaud_rate
valuemeasured at Rated voltage 9.0-12.6V · Reduction ratio 387:1
9600~1Mbps
source sentenceBaud Rate 9600~1Mbps
sourcehttps://aifitlab.com/products/fashion-star-hx8-u51h-m-uart-bus-servo · Distributor page
EvidenceSourced
Retrieved · Changed2026-08-28Changed —
Reduction ratioreduction_ratio
valuemeasured at Rated voltage 9.0-12.6V
as printed 387:1387
source sentenceGear Ratio 387:1
sourcehttps://aifitlab.com/products/fashion-star-hx8-u51h-m-uart-bus-servo · Distributor page
EvidenceSourced
Retrieved · Changed2026-08-28Changed —
Overall dimensionsoverall_dimensions
valuemeasured at Rated voltage 9.0-12.6V · Reduction ratio 387:1
40×40×20mm
source sentenceDimensions 40×40×20mm
sourcehttps://aifitlab.com/products/fashion-star-hx8-u51h-m-uart-bus-servo · Distributor page
EvidenceSourced
Retrieved · Changed2026-08-28Changed —
Weightweight
valuemeasured at Rated voltage 9.0-12.6V · Reduction ratio 387:1
as printed 83g0.083 kg
source sentenceWeight 83g
sourcehttps://aifitlab.com/products/fashion-star-hx8-u51h-m-uart-bus-servo · Distributor page
EvidenceSourced
Retrieved · Changed2026-08-28Changed —
Rated voltagerated_voltage
valuemeasured at Reduction ratio 387:1
9.0-12.6V
source sentenceOperating Voltage 9.0-12.6V
sourcehttps://robotopian.com/products/fashion-star-hx8-u51h-m-uart-bus-servo · Distributor page
EvidenceSourced
Retrieved · Changed2026-09-01Changed —
Stall torquestall_torque
valuemeasured at Rated voltage 9.0-12.6V · Reduction ratio 387:1
as printed 50kg-cm (4.90N·m)4.903 N·m
source sentenceStall Torque 50kg-cm (4.90N·m)
sourcehttps://robotopian.com/products/fashion-star-hx8-u51h-m-uart-bus-servo · Distributor page
EvidenceSourced
Retrieved · Changed2026-09-01Changed —
No-load speedno_load_speed
valuemeasured at Rated voltage 9.0-12.6V · Reduction ratio 387:1
as printed 70.0rpm (0.151sec@60°)70 r/min
source sentenceNo-load Speed 70.0rpm (0.151sec@60°)
sourcehttps://robotopian.com/products/fashion-star-hx8-u51h-m-uart-bus-servo · Distributor page
EvidenceSourced
Retrieved · Changed2026-09-01Changed —
Ambient temperatureambient_temperature
valuemeasured at Rated voltage 9.0-12.6V · Reduction ratio 387:1
-10 ~ 60°C
source sentenceOperating Temperature -10 ~ 60°C
sourcehttps://robotopian.com/products/fashion-star-hx8-u51h-m-uart-bus-servo · Distributor page
EvidenceSourced
Retrieved · Changed2026-09-01Changed —
Stall currentstall_current
valuemeasured at Rated voltage 9.0-12.6V · Reduction ratio 387:1
as printed 5.5A5.5 A
source sentenceStall Current 5.5A
sourcehttps://robotopian.com/products/fashion-star-hx8-u51h-m-uart-bus-servo · Distributor page
EvidenceSourced
Retrieved · Changed2026-09-01Changed —
Protocolprotocol
valuemeasured at Rated voltage 9.0-12.6V · Reduction ratio 387:1
UART/TTL
source sentenceCommunication Protocol UART/TTL
sourcehttps://robotopian.com/products/fashion-star-hx8-u51h-m-uart-bus-servo · Distributor page
EvidenceSourced
Retrieved · Changed2026-09-01Changed —
Baud ratebaud_rate
valuemeasured at Rated voltage 9.0-12.6V · Reduction ratio 387:1
9600~1Mbps
source sentenceBaud Rate 9600~1Mbps
sourcehttps://robotopian.com/products/fashion-star-hx8-u51h-m-uart-bus-servo · Distributor page
EvidenceSourced
Retrieved · Changed2026-09-01Changed —
Reduction ratioreduction_ratio
valuemeasured at Rated voltage 9.0-12.6V
as printed 387:1387
source sentenceGear Ratio 387:1
sourcehttps://robotopian.com/products/fashion-star-hx8-u51h-m-uart-bus-servo · Distributor page
EvidenceSourced
Retrieved · Changed2026-09-01Changed —
Overall dimensionsoverall_dimensions
valuemeasured at Rated voltage 9.0-12.6V · Reduction ratio 387:1
40×40×20mm
source sentenceDimensions 40×40×20mm
sourcehttps://robotopian.com/products/fashion-star-hx8-u51h-m-uart-bus-servo · Distributor page
EvidenceSourced
Retrieved · Changed2026-09-01Changed —
Weightweight
valuemeasured at Rated voltage 9.0-12.6V · Reduction ratio 387:1
as printed 83g0.083 kg
source sentenceWeight 83g
sourcehttps://robotopian.com/products/fashion-star-hx8-u51h-m-uart-bus-servo · Distributor page
EvidenceSourced
Retrieved · Changed2026-09-01Changed —
No-load currentno_load_current
valuemeasured at Rated voltage 9.0-12.6V · Reduction ratio 387:1
as printed 300mA0.3 A
source sentenceNo-load Current 300mA
sourcehttps://aifitlab.com/products/fashion-star-hx8-u51h-m-uart-bus-servo · Distributor page
EvidenceSourced
Retrieved · Changed2026-08-28Changed —
Bus ID rangebus_id_range
valuemeasured at Rated voltage 9.0-12.6V · Reduction ratio 387:1
0~254
source sentenceID Range 0~254
sourcehttps://aifitlab.com/products/fashion-star-hx8-u51h-m-uart-bus-servo · Distributor page
EvidenceSourced
Retrieved · Changed2026-08-28Changed —
No-load currentno_load_current
valuemeasured at Rated voltage 9.0-12.6V · Reduction ratio 387:1
as printed 300mA0.3 A
source sentenceNo-load Current 300mA
sourcehttps://robotopian.com/products/fashion-star-hx8-u51h-m-uart-bus-servo · Distributor page
EvidenceSourced
Retrieved · Changed2026-09-01Changed —
Bus ID rangebus_id_range
valuemeasured at Rated voltage 9.0-12.6V · Reduction ratio 387:1
0~254
source sentenceID Range 0~254
sourcehttps://robotopian.com/products/fashion-star-hx8-u51h-m-uart-bus-servo · Distributor page
EvidenceSourced
Retrieved · Changed2026-09-01Changed —
Idle currentidle_current
valuemeasured at Rated voltage 9.0-12.6V · Reduction ratio 387:1
as printed 40mA0.04 A
source sentenceStandby Current 40mA
sourcehttps://aifitlab.com/products/fashion-star-hx8-u51h-m-uart-bus-servo · Distributor page
EvidenceSourced
Retrieved · Changed2026-08-28Changed —
Position sensor typeposition_sensor_type
valuemeasured at Rated voltage 9.0-12.6V · Reduction ratio 387:1
12bit Non-contact Encoder (Magnetic)
source sentencePosition Sensor 12bit Non-contact Encoder (Magnetic)
sourcehttps://aifitlab.com/products/fashion-star-hx8-u51h-m-uart-bus-servo · Distributor page
EvidenceSourced
Retrieved · Changed2026-08-28Changed —
Output shaftoutput_shaft
valuemeasured at Rated voltage 9.0-12.6V · Reduction ratio 387:1
Stainless Steel / ø6mm / D-Type
source sentenceOutput Shaft Stainless Steel / ø6mm / D-Type
sourcehttps://aifitlab.com/products/fashion-star-hx8-u51h-m-uart-bus-servo · Distributor page
EvidenceSourced
Retrieved · Changed2026-08-28Changed —
Idle currentidle_current
valuemeasured at Rated voltage 9.0-12.6V · Reduction ratio 387:1
as printed 40mA0.04 A
source sentenceStandby Current 40mA
sourcehttps://robotopian.com/products/fashion-star-hx8-u51h-m-uart-bus-servo · Distributor page
EvidenceSourced
Retrieved · Changed2026-09-01Changed —
Position sensor typeposition_sensor_type
valuemeasured at Rated voltage 9.0-12.6V · Reduction ratio 387:1
12bit Non-contact Encoder (Magnetic)
source sentencePosition Sensor 12bit Non-contact Encoder (Magnetic)
sourcehttps://robotopian.com/products/fashion-star-hx8-u51h-m-uart-bus-servo · Distributor page
EvidenceSourced
Retrieved · Changed2026-09-01Changed —
Output shaftoutput_shaft
valuemeasured at Rated voltage 9.0-12.6V · Reduction ratio 387:1
Stainless Steel / ø6mm / D-Type
source sentenceOutput Shaft Stainless Steel / ø6mm / D-Type
sourcehttps://robotopian.com/products/fashion-star-hx8-u51h-m-uart-bus-servo · Distributor page
EvidenceSourced
Retrieved · Changed2026-09-01Changed —
specs 30, 30 shown
Source documents.
2 sources the values were read from
2 documents
aifitlab.com/products/fashion-star-hx8-u51h-m-uart-bus-servoDistributor page · 15 valuesRetrieved 2026-08-28
robotopian.com/products/fashion-star-hx8-u51h-m-uart-bus-servoDistributor page · 15 valuesRetrieved 2026-09-01
DownloadSource files are not published yet: which documents may be published is undecided.
No change
2026-08-28first collected · 2 sources
Next update2026-10-01
Change history kept
Build a joint around this part.
Put a motor, a reducer and an encoder into the slots to see whether they combine.
Check joint combinationsJOINT · HX8-U51H-M · B · Motors
StatusNeeds checking
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- No verdict: the specification keys it needs are not settled
To settle before a verdict
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