Weight
Part A70 g9 g lower
Part B79 g
Part comparison
KST BLS815 vs MKS HBL550
A side-by-side comparison of source-backed specifications within the same subcategory.
13 shared specs4 scored
Directional spec summary
Counts across 4 numeric specifications with a clear higher-or-lower direction.
Part A leads
2
Tied
0
Part B leads
2
These are metric-by-metric differences, not an overall performance score. Check the values below.
Specifications
13 specifications compared side by side.
| Compare bySpecification | AKSTKST BLS815 | BMKSMKS HBL550 |
|---|---|---|
| Physical1 | ||
| Weight | 70 g9 g lower | 79 g |
| Performance3 | ||
| Stall torque | 1.961 Nm | 3.825 Nm1.864 Nm higher |
| Stall torque @ 8.4V | 20 kg·cm | 39 kg·cm19 kg·cm higher |
| Speed @ 8.4V | 0.07 s/60°0.01 s/60° lower | 0.08 s/60° |
| Electrical2 | ||
| Minimum voltage | 6 V | 6 V |
| Maximum voltage | 8.4 V | 8.4 V |
| Mechanical & integration3 | ||
| Motor kind | Rc servo | Rc servo |
| Drive principle | servo actuator | servo actuator |
| Architecture | Integrated servo module | Integrated servo module |
| Control & communication3 | ||
| Communication interfaces | PWM | PWM |
| Control modes | PWM servo | PWM servo |
| Servo signal | PWM | PWM |
| Other specifications1 | ||
| PWM pulse center | 1500 µs | 1500 µs |
AKSTKST BLS815
BMKSMKS HBL550
Physical1
Performance3
Stall torque
Part A1.961 Nm
Part B3.825 Nm1.864 Nm higher
Stall torque @ 8.4V
Part A20 kg·cm
Part B39 kg·cm19 kg·cm higher
Speed @ 8.4V
Part A0.07 s/60°0.01 s/60° lower
Part B0.08 s/60°
Electrical2
Minimum voltage
Part A6 V
Part B6 V
Maximum voltage
Part A8.4 V
Part B8.4 V
Mechanical & integration3
Motor kind
Part ARc servo
Part BRc servo
Drive principle
Part Aservo actuator
Part Bservo actuator
Architecture
Part AIntegrated servo module
Part BIntegrated servo module
Control & communication3
Communication interfaces
Part APWM
Part BPWM
Control modes
Part APWM servo
Part BPWM servo
Servo signal
Part APWM
Part BPWM
Other specifications1
PWM pulse center
Part A1500 µs
Part B1500 µs
Product sources
Product sources used by this comparison
KST BLS815Open source ↗
MKS HBL550Open source ↗