Manufacturer catalogue image · Series illustration

57BYG hybrid stepper motor series

Phases: Two-phase / three-phase options
Insulation: Class B
Step Accuracy: 5%
Ambient Temperature: −20°C to +50°C

Catalogue series · Exact configuration and availability confirmed by the manufacturer.

TAILI 57BYG: order the winding, connection and shaft assembly together

The 57BYG frame designation is not a complete replacement specification. TAILI’s six 57BYG250-H entries span 0.45–2 N·m holding torque and 2–4 A rated current, while its connection illustrations include both two-phase and three-phase arrangements. Start with the complete suffix and the delivered lead arrangement before matching an existing driver or mounting plate.

Six listed windings, not one interchangeable 57 mm motor

Each row lists a 1.8° step angle. The voltage column is explicitly driver operating voltage, not a voltage to apply directly to a stationary winding. Holding torque is a stationary rating; it does not describe available torque at operating speed.

57BYG250 suffix	Holding torque	Rated current	Driver supply	Phase inductance / resistance
41H	0.45 N·m	2 A	24 V	3.5 mH / 1.5 Ω
52H	0.8 N·m	2.5 A	24 V	3.4 mH / 1.3 Ω
56H	1 N·m	2.5 A	24 V	2.5 mH / 1.2 Ω
76H	1.2 N·m	3 A	24 V	2 mH / 0.48 Ω
82H	1.5 N·m	3 A	24 V	2 mH / 0.8 Ω
115H	2 N·m	4 A	40–60 V	3.5 mH / 1 Ω

Identify the lead set before reusing a drive

Four leads: two separate phase pairs

The two-phase four-lead diagram identifies red A+, green A−, yellow B+ and blue B−. A replacement still needs the selected winding’s current limit and a compatible driver; identical wire colours do not establish that an old current setting is correct.

Six leads: the centre taps change the connection decision

The two-phase six-lead illustration adds white Ac and black Bc centre taps to those four phase-end colours. Specify whether the application uses full windings or centre taps and obtain the matching current setting. Do not join the extra wires merely to make the new harness resemble a four-lead motor.

Three leads: request a confirmed terminal drawing

The three-phase diagram marks red U, green V and yellow W, but the accompanying table instead lists black U, white V and red W. These two colour assignments conflict. State the required three-phase configuration in the enquiry and obtain the delivered motor’s terminal identification; neither assignment should be silently selected as the universal wiring instruction.

Separate the bare motor from the geared and linear assemblies

Bare-motor front interface

The bare-motor drawing shows a 57 mm face, four 5 mm mounting holes on a 47.1 mm square pattern, a 38.1 mm locating register and an 8 mm shaft projecting 20.5 mm. The shaft has a flat dimensioned at 7.5 mm across the reduced section. Check the register, coupling fit and shaft projection together; body length alone is not enough to establish a drop-in replacement.

The adjacent gearbox drawing describes a different envelope

A separate assembly drawing shows a 61 mm gearbox face, a 49.5 mm mounting pattern and a 30 mm output-shaft projection. Additional drawings show horizontal and vertical rack arrangements. These are not alternative dimensions of the bare 57 mm motor. A geared or rack-drive order needs the complete assembly drawing, selected transmission ratio and load requirement.

Ask for the H-suffix curve used for the operating point

The displayed torque curves use 57BYG250A/B/C/D labels, whereas the winding table uses 41H through 115H suffixes. No mapping between those naming systems is provided. For a running-torque decision, request the curve identified with the exact H-suffix motor, supply voltage, configured current and driver. Do not attach the strongest displayed curve to the 115H simply because it has the highest holding torque.

Include the installed thermal condition

TAILI lists −20°C to +50°C ambient, class B insulation and a maximum motor surface temperature of 80°C at rated current. The 80°C figure is a surface-temperature limit, not an 80 K allowable temperature rise. For an enclosed installation, specify ambient temperature, standstill duration and duty cycle, then verify the motor surface temperature with the actual current setting and mounting arrangement.

CATALOGUE OVERVIEW

About this motor series

TAILI lists the 57BYG as a hybrid stepper family with two-phase and three-phase options. The manufacturer specifies class B insulation, a −20°C to +50°C ambient operating range and step accuracy of 5%. Detailed winding and dimensional drawings accompany the series.

Choose the phase configuration and current rating together with the stepper driver. For integration, check shaft dimensions, the locating pilot and alignment with the driven load. Request the exact model torque-speed curve rather than treating the frame designation as a torque rating.

Model / series reference: 57BYG

Published specifications

Specifications describe a series range; confirm which ratings apply together to the quoted model.

Phases: Two-phase / three-phase options
Insulation: Class B
Step Accuracy: 5%
Ambient Temperature: −20°C to +50°C
Power: Confirm configuration
Voltage: Confirm supply
Speed: Model dependent
Catalogue Type: Product series

Confirm mounting and shaft dimensions against the drawing for the quoted configuration.

57BYG hybrid stepper motor series

TAILI 57BYG: order the winding, connection and shaft assembly together

Six listed windings, not one interchangeable 57 mm motor

Identify the lead set before reusing a drive

Separate the bare motor from the geared and linear assemblies

About this motor series

Published specifications

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