BXR Model | Miki Pulley

This brake is designed exclusively for holding and emergency braking; by reducing its thickness to two-thirds that of conventional models (compared to our previous models) and eliminating protruding parts, it enables space-saving installation.Its most notable feature is the significant weight reduction of the rotor, which dramatically reduces wear caused by idling. Furthermore, the low inertia resulting from this weight reduction allows for integration without compromising the servo motor’s responsiveness.

[Specifications] Square hub type

Model	Size	Static Friction Torque T_s [N·m]	Coil (at 20°C)				Temperature Class	Lead Wire		Maximum rotational speed [min⁻¹]	Rotating mass moment of inertia J [kg·m²]	Allowable braking work Ebaℓ [J]	Total braking work ET [J]	Armature attraction time ta [s]	Armature release time tar [s]	Backlash [°]	Mass [kg]
Model	Size	Static Friction Torque T_s [N·m]	Voltage [V]	Power [W]	Current [A]	Resistance [Ω]	Temperature Class	UL Style	Size	Maximum rotational speed [min⁻¹]	Rotating mass moment of inertia J [kg·m²]	Allowable braking work Ebaℓ [J]	Total braking work ET [J]	Armature attraction time ta [s]	Armature release time tar [s]	Backlash [°]	Mass [kg]
BXR-06-10-005	6	5	24	17.6	0.73	32.7	F	UL1333	AWG 20	5000	2.35×10⁻⁵	500	2.0×10⁵	0.05	0.02	1.2	0.9
BXR-08-10-012	8	12	24	19.4	0.81	29.7	F	UL1333	AWG 20	5000	3.45×10⁻⁵	800	2.0×10⁵	0.08	0.02	1.2	1.2
BXR-10-10-016	10	16	24	21.5	0.9	26.8	F	UL1333	AWG 20	5000	1.12×10⁻⁴	1500	2.2×10⁶	0.11	0.05	0.9	1.3
BXR-12-10-030	12	30	24	23.7	0.99	24.3	F	UL1333	AWG 20	5000	1.88×10⁻⁴	1500	2.5×10⁶	0.12	0.03	0.8	2.3
BXR-14-10-038	14	38	24	31	1.29	18.6	F	UL1333	AWG 20	3600	4.22×10⁻⁴	1800	3.0×10⁶	0.12	0.03	0.5	3
BXR-16-10-055	16	55	24	19	0.79	30.3	F	UL1333	AWG 20	3600	7.10×10⁻⁴	2000	3.0×10⁶	0.22	0.1	0.5	3.6

The armature pull-in time and armature release time are values measured during DC-side switching.
Backlash refers to the value between the rotor and the rotor hub.

[Dimensions] Square Hub Type

三木プーリの無励磁作動保持用BXRモデル角ハブタイプ電磁ブレーキ寸法図外形寸法および主要部寸法を示す寸法図

Unit [mm]

Size	Radial dimensions									Axial dimensions					Bore Dimensions				CAD File No.
Size	A	B	C	D	r	E	F	R	S	J	L	N	K	a	d	b	t	d max	CAD File No.
06	83.5	76	82	47	R0.5	42	35	4.5	9	17	7	14.7	25.0	0.10	20	6	22.5	25	－
0.8	93.5	85	92	49	R0.5	42	35	4.5	10	19	7	15.7	27.0	0.10	20	6	22.5	25	－
10	123.5	115	122	62	R0.5	55	45	4.5	9.5	14.6	9	13.7	24.3	0.10	24	8	27	28	－
12	137.5	130	136	65	R1	62	50	4.5	12	15.4	9	12.5	25.0	0.15	24	8	27	30	－
14	167.5	158	166	80	R1	74	60	5.5	12	16	9	12.0	25.0	0.15	28	8	31	38	－
16	185	175	184	100	R1	86	65	5.5	12.5	21.3	11.5	19.4	32.8	0.20	28	8	31	45	－

[Specifications] Spline hub type

Model	Size	Static Friction Torque Ts [N·m]	Coil (at 20°C)				Temperature Class	Lead Wire		Maximum rotational speed [min⁻¹]	Rotating mass moment of inertia J [kg·m²]	Allowable braking work Ebaℓ [J]	Total braking work ET [J]	Armature attraction time ta [s]	Armature release time tar [s]	Backlash [°]	Mass [kg]
Model	Size	Static Friction Torque Ts [N·m]	Voltage [V]	Power [W]	Current [A]	Resistance [Ω]	Temperature Class	UL Style	Size	Maximum rotational speed [min⁻¹]	Rotating mass moment of inertia J [kg·m²]	Allowable braking work Ebaℓ [J]	Total braking work ET [J]	Armature attraction time ta [s]	Armature release time tar [s]	Backlash [°]	Mass [kg]
BXR-06-20-005	06	5	24	17.6	0.73	32.7	F	UL1333	AWG 20	5000	3.39×10⁻⁵	500	2.0×10⁵	0.05	0.02	0.5	1.1
BXR-08-20-012	08	12	24	19.4	0.81	29.7	F	UL1333	AWG 20	5000	7.56×10⁻⁵	800	2.0×10⁵	0.08	0.02	0.4	1.4
BXR-10-20-016	10	16	24	21.5	0.9	26.8	F	UL1333	AWG20	5000	3.02×10⁻⁴	1500	2.2×10⁶	0.11	0.05	0.3	1.6
BXR-12-20-030	12	30	24	23.7	0.99	24.3	F	UL1333	AWG 20	5000	4.77×10⁻⁴	1500	2.5×10⁶	0.12	0.03	0.3	2.6
BXR-14-20-038	14	38	24	31.0	1.29	18.6	F	UL1333	AWG 20	3600	11.3×10⁻⁴	1800	3.0×10⁶	0.12	0.03	0.2	3.5
BXR-16-20-055	16	55	24	19.0	0.79	30.3	F	UL1333	AWG20	3600	19.1×10⁻⁴	2000	3.0×10⁶	0.22	0.10	0.2	4.1

The armature pull-in time and armature release time are values measured during DC-side switching.
Backlash refers to the value between the rotor and the rotor hub.

[Dimensions] Spline Hub Type

三木プーリの無励磁作動保持用BXRモデルスプラインハブタイプの電磁ブレーキ寸法図外形寸法および主要部寸法を示す寸法図

Unit [mm]

Size	Radial dimensions								Axial dimensions							Bore diameter
Size	A	B	C	D	r	E	R	S	J	J1	L	N	K	K1	a	d	b	t	d max
06	83.5	76	82	47	R0.5	36	4.5	9	10.5	18	12.5	14.7	25.0	30.5	0.10	20	6	22.5	25
0.8	93.5	85	92	49	R0.5	42	4.5	10	11.5	20	13.5	15.7	27.0	33.5	0.10	20	6	22.5	30
10	123.5	115	122	62	R0.5	56	4.5	9.5	9	18	15	13.7	24.3	33	0.10	24	8	27	40
12	137.5	130	136	65	R1	61	4.5	12	8.7	17.7	15	12.5	25.0	32.7	0.15	24	8	27	45
14	167.5	158	166	80	R1	75	5.5	12	7.2	17.2	16	12.0	25.0	33.2	0.15	28	8	31	55
16	185	175	184	100	R1	82	5.5	12.5	13.6	24.6	18	19.4	32.8	42.6	0.20	28	8	31	65