Lafert

Ultra Compact: designed for high dynamic performance in minimum installation space

Ultra Compact Servo Motors are designed for applications where machine layout constraints and motion performance requirements must be addressed simultaneously. The series combines compact mechanical dimensions with high torque density, enabling dynamic motion without increasing shaft size or machine footprint.

The availability of five frame sizes allows machine builders to create compact, high-performance solutions while maintaining flexibility in machine design. This makes Ultra Compact servo motors particularly suitable for applications that require high acceleration, fast cycle times, and precise positioning within limited space.

The design is intended for industrial applications that demand smooth and precise motion, including sectors such as printing, packaging, robotics, metal working, and plastic machinery. The compact construction supports tight machine layouts without compromising control stability or repeatability.

When equipped with the optional single-cable Hiperface DSL interface, the Ultra Compact servo motors simplify installation and reduce wiring complexity, while ensuring reliable communication between motor and drive. This contributes to faster commissioning and consistent performance in demanding motion control environments.

Even in space-constrained machines, the combination of high dynamic capability, customization options, and engineering flexibility enables Ultra Compact servo motors to deliver reliable and precise motion performance.

Main advantages

Up to +30% torque density, enabling higher performance within compact motor sizes
High torque quality and stability for regular, precise and repeatable motion
Up to 20% reduction in overall dimensions, supporting compact machine design
Single-cable DSL interface for easier and more effective system integration

TORQUE

0.36

30 Nm

SQUARE FLANGE

142 mm

SPEED

UP TO 6000 rpm

FRAME SIZE

B28UB56UB63UB64UB71U

STANDARD SPECIFICATIONS

- 5 sizes - 10 poles
- Square flange 58 to 142 mm
- Torque range 0.36 to 30 Nm; speed up to 6000 rpm
- Top performance, low torque ripple
- Ultra compact design
- Wide range of transducers:
resolver, incremental encoder, Hiperface, Hiperface DSL, EnDat
- IP65 Protection; TENV design
- Great flexibility to satisfy market's needs

options

- Special windings
- Brake option
- Customized flanges and special shafts
- Water cooling
- 230V application
- Safety application
- cURus certification
- ATEX certification

LOOK FOR YOUR PRODUCT

Type	Square flange mm	Nm	rpm	Cooling	Brake
B28.D4U	58	0.36	6000	self cooled	with
B28.D4U	58	0.36	6000	self cooled	without
B28.D7U	58	0.65	4500	self cooled	with
B28.D7U	58	0.65	4500	self cooled	without
B28.D7U	58	0.65	6000	self cooled	with
B28.D7U	58	0.65	6000	self cooled	without
B28.01U	58	0.95	4500	self cooled	with
B28.01U	58	0.95	4500	self cooled	without
B28.01U	58	0.95	6000	self cooled	with
B28.01U	58	0.95	6000	self cooled	without
B28.E2U	58	1.20	4500	self cooled	with
B28.E2U	58	1.20	4500	self cooled	without
B28.E2U	58	1.20	6000	self cooled	with
B28.E2U	58	1.20	6000	self cooled	without
B28.E4U	58	1.40	4500	self cooled	with
B28.E4U	58	1.40	4500	self cooled	without
B28.E4U	58	1.40	6000	self cooled	with
B28.E4U	58	1.40	6000	self cooled	without
B56.F6U	91	2.60	3000	self cooled	with
B56.F6U	91	2.60	3000	self cooled	without
B56.F6U	91	2.60	6000	self cooled	with
B56.F6U	91	2.60	6000	self cooled	without
B56.G5U	91	3.50	3000	self cooled	with
B56.G5U	91	3.50	3000	self cooled	without
B56.G5U	91	3.50	6000	self cooled	with
B56.G5U	91	3.50	6000	self cooled	without
B56.H6U	91	4.60	3000	self cooled	with
B56.H6U	91	4.60	3000	self cooled	without
B56.H6U	91	4.60	6000	self cooled	with
B56.H6U	91	4.60	6000	self cooled	without
B56.I5U	91	5.50	3000	self cooled	with
B56.I5U	91	5.50	3000	self cooled	without
B56.I5U	91	5.50	6000	self cooled	with
B56.I5U	91	5.50	6000	self cooled	without
B63.H5U	100	4.50	3000	self cooled	with
B63.H5U	100	4.50	3000	self cooled	without
B63.H5U	100	4.50	6000	self cooled	with
B63.H5U	100	4.50	6000	self cooled	without
B63.06U	100	6.40	3000	self cooled	with
B63.06U	100	6.40	3000	self cooled	without
B63.06U	100	6.40	6000	self cooled	with
B63.06U	100	6.40	6000	self cooled	without
B63.06U	100	8.30	3000	air cooled	with
B63.06U	100	8.30	3000	air cooled	without
B63.06U	100	8.30	6000	air cooled	with
B63.06U	100	8.30	6000	air cooled	without
B63.08U	100	8.40	3000	self cooled	with
B63.08U	100	8.40	3000	self cooled	without
B63.08U	100	8.40	6000	self cooled	with
B63.08U	100	8.40	6000	self cooled	without
B63.10U	100	10.20	3000	self cooled	with
B63.10U	100	10.20	3000	self cooled	without
B63.10U	100	10.20	6000	self cooled	with
B63.10U	100	10.20	6000	self cooled	without
B63.08U	100	10.90	3000	air cooled	with
B63.08U	100	10.90	3000	air cooled	without
B63.08U	100	10.90	6000	air cooled	with
B63.08U	100	10.90	6000	air cooled	without
B63.12U	100	11.70	3000	self cooled	with
B63.12U	100	11.70	3000	self cooled	without
B63.12U	100	11.70	6000	self cooled	with
B63.12U	100	11.70	6000	self cooled	without
B63.10U	100	13.30	3000	air cooled	with
B63.10U	100	13.30	3000	air cooled	without
B63.10U	100	13.30	6000	air cooled	with
B63.10U	100	13.30	6000	air cooled	without
B63.12U	100	15.20	3000	air cooled	with
B63.12U	100	15.20	3000	air cooled	without
B63.12U	100	15.20	6000	air cooled	with
B63.12U	100	15.20	6000	air cooled	without
B64.06U	116	6.50	3000	self cooled	with
B64.06U	116	6.50	3000	self cooled	without
B64.06U	116	6.50	4500	self cooled	with
B64.06U	116	6.50	4500	self cooled	without
B64.06U	116	8.50	3000	air cooled	with
B64.06U	116	8.50	3000	air cooled	without
B64.06U	116	8.50	4500	air cooled	with
B64.06U	116	8.50	4500	air cooled	without
B64.11U	116	11.50	3000	self cooled	with
B64.11U	116	11.50	3000	self cooled	without
B64.11U	116	11.50	4500	self cooled	with
B64.11U	116	11.50	4500	self cooled	without
B64.15U	116	15.50	3000	self cooled	with
B64.11U	116	15.50	3000	air cooled	with
B64.15U	116	15.50	3000	self cooled	without
B64.11U	116	15.50	3000	air cooled	without
B64.15U	116	15.50	4500	self cooled	with
B64.11U	116	15.50	4500	air cooled	with
B64.15U	116	15.50	4500	self cooled	without
B64.11U	116	15.50	4500	air cooled	without
B64.19U	116	19.00	3000	self cooled	with
B64.19U	116	19.00	3000	self cooled	without
B64.19U	116	19.00	4500	self cooled	with
B64.19U	116	19.00	4500	self cooled	without
B64.15U	116	21.40	3000	air cooled	with
B64.15U	116	21.40	3000	air cooled	without
B64.15U	116	21.40	4500	air cooled	with
B64.15U	116	21.40	4500	air cooled	without
B64.19U	116	27.00	3000	air cooled	with
B64.19U	116	27.00	3000	air cooled	without
B64.19U	116	27.00	4500	air cooled	with
B64.19U	116	27.00	4500	air cooled	without
B71.12U	142	12.50	2200	self cooled	without
B71.12U	142	12.50	2200	self cooled	with
B71.12U	142	12.50	3000	self cooled	without
B71.12U	142	12.50	3000	self cooled	with
B71.12U	142	12.50	4500	self cooled	without
B71.12U	142	12.50	4500	self cooled	with
B71.12U	142	16.30	2200	air cooled	without
B71.12U	142	16.30	2200	air cooled	with
B71.12U	142	16.30	3000	air cooled	without
B71.12U	142	16.30	3000	air cooled	with
B71.12U	142	16.30	4500	air cooled	without
B71.12U	142	16.30	4500	air cooled	with
B71.17U	142	17.00	2200	self cooled	without
B71.17U	142	17.00	2200	self cooled	with
B71.17U	142	17.00	3000	self cooled	without
B71.17U	142	17.00	3000	self cooled	with
B71.17U	142	17.00	4500	self cooled	without
B71.17U	142	17.00	4500	self cooled	with
B71.21U	142	21.50	2200	self cooled	without
B71.21U	142	21.50	2200	self cooled	with
B71.21U	142	21.50	3000	self cooled	without
B71.21U	142	21.50	3000	self cooled	with
B71.21U	142	21.50	4500	self cooled	without
B71.21U	142	21.50	4500	self cooled	with
B71.17U	142	22.10	2200	air cooled	without
B71.17U	142	22.10	2200	air cooled	with
B71.17U	142	22.10	3000	air cooled	without
B71.17U	142	22.10	3000	air cooled	with
B71.17U	142	22.10	4500	air cooled	without
B71.17U	142	22.10	4500	air cooled	with
B71.26U	142	26.00	2200	self cooled	without
B71.26U	142	26.00	2200	self cooled	with
B71.26U	142	26.00	3000	self cooled	without
B71.26U	142	26.00	3000	self cooled	with
B71.21U	142	28.00	2200	air cooled	without
B71.21U	142	28.00	2200	air cooled	with
B71.21U	142	28.00	3000	air cooled	without
B71.21U	142	28.00	3000	air cooled	with
B71.21U	142	28.00	4500	air cooled	without
B71.21U	142	28.00	4500	air cooled	with
B71.30U	142	30.00	2200	self cooled	without
B71.30U	142	30.00	2200	self cooled	with
B71.30U	142	30.00	3000	self cooled	without
B71.30U	142	30.00	3000	self cooled	with
B71.26U	142	33.80	2200	air cooled	without
B71.26U	142	33.80	2200	air cooled	with
B71.26U	142	33.80	3000	air cooled	without
B71.26U	142	33.80	3000	air cooled	with
B71.30U	142	39.00	2200	air cooled	without
B71.30U	142	39.00	2200	air cooled	with
B71.30U	142	39.00	3000	air cooled	without
B71.30U	142	39.00	3000	air cooled	with

TECHNICAL FAQS

Why are Ultra Compact Servo Motors suitable for space-constrained machines?

Even in space-constrained machines, Ultra Compact Servo Motors deliver high torque density within reduced mechanical dimensions. This allows machine builders to achieve dynamic performance and precise motion control without compromising motion quality, supporting compact machine architectures with stable and repeatable behaviour.

Why is torque density important in ultra compact servo applications?

In compact machines, motor size is often constrained while acceleration and cycle time requirements remain high. High torque density allows faster dynamic response without increasing motor dimensions, enabling short cycle times and stable motion performance in tight layouts.

How does inertia matching influence performance in compact axes?

In compact axes, the inertia ratio between motor and the load strongly influences control stability and positioning accuracy. Proper inertia matching helps reduce oscillations, settling time, and mechanical stress, improving repeatability and long-term reliability. Inertia matching is a key consideration in servo system design and motor selection.

How does duty cycle affect thermal behaviour in ultra compact motors?

Compact motors operate with reduced thermal margins due to limited surface area and airflow. Applications with frequent acceleration, continuous operation, or high holding torque require careful duty cycle evaluation to prevent overheating and performance derating. Correct sizing ensures reliable operation over the motor’s lifetime.

How does the single-cable Hiperface DSL interface benefit machine design?

The single-cable Hiperface DSL interface reduces wiring complexity and installation time while providing reliable, high-quality communication between motor and drive. This supports cleaner machine layouts, faster commissioning, and consistent motion control performance.

What trade-offs should be considered when selecting an ultra compact servo motor?

Ultra compact servo motors are designed to maximize torque density and dynamic performance within limited space. When selecting a compact motor, engineers should evaluate duty cycle, cooling conditions, inertia matching, and continuous torque requirements to ensure thermal stability and long-term reliability. Proper sizing and application analysis help achieve optimal performance without unnecessary oversizing.

How does feedback selection influence performance and integration?

Feedback [NG4.1]technology affects positioning accuracy, control stability, and system integration. Ultra Compact Servo Motors can be configured with different feedback solutions, including resolvers, digital encoders, and optional single-cable Hiperface DSL. Selecting the appropriate feedback option helps optimize motion performance and simplifies integration with the chosen drive platform.

Brushless Servo Motors

ULTRA COMPACT SERVO MOTORS

Ultra Compact: designed for high dynamic performance in minimum installation space

TORQUE

SQUARE FLANGE

SPEED

FRAME SIZE

STANDARD SPECIFICATIONS

options

LOOK FOR YOUR PRODUCT

Industries

Industrial Machineries

Material Handling

Food & Beverage, Hospitality

Robotic

Rubber & Plastics

Textile

TECHNICAL FAQS

Why are Ultra Compact Servo Motors suitable for space-constrained machines?

Why is torque density important in ultra compact servo applications?

How does inertia matching influence performance in compact axes?

How does duty cycle affect thermal behaviour in ultra compact motors?

How does the single-cable Hiperface DSL interface benefit machine design?

What trade-offs should be considered when selecting an ultra compact servo motor?

How does feedback selection influence performance and integration?

How does feedback selection influence performance and integration?

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