Details
NRND

RE-max 21 Ø21 mm, Graphite Brushes, 6 Watt, with terminals

Part number 250004

RE-max 21 Ø21 mm, Graphite Brushes, 6 Watt, with terminals
Price scales Quantity Price per unit
Prices excluding VAT and shipping costs 1-4 €112.21
5-19 €102.21
20-49 €93.47
from 50 On request

NRND (Not Recommended for New Designs): These products continue to be available, but are not recommended for new projects. Our sales team will be happy to suggest alternatives.

Specifications

Technical illustrations

Information: Drawings are not to scale.

Values at nominal voltage
Nominal voltage 18 V
No load speed 9680 rpm
No load current 27.7 mA
Nominal speed 7570 rpm
Nominal torque (max. continuous torque) 7.24 mNm
Nominal current (max. continuous current) 0.441 A
Stall torque 33.7 mNm
Stall current 1.93 A
Max. efficiency 78 %
Characteristics
Terminal resistance 9.32 Ω
Terminal inductance 0.354 mH
Torque constant 17.5 mNm/A
Speed constant 546 rpm/V
Speed / torque gradient 291 rpm/mNm
Mechanical time constant 6.7 ms
Rotor inertia 2.2 gcm²
Thermal data
Thermal resistance housing-ambient 28 K/W
Thermal resistance winding-housing 8 K/W
Thermal time constant winding 8.75 s
Thermal time constant motor 501 s
Ambient temperature -30...+85 °C
Max. winding temperature +125 °C
Mechanical data
Bearing type sleeve bearing
Max. speed 12000 rpm
Axial play 0.05 - 0.15 mm
Radial play 0.012 mm
Max. axial load (dynamic) 1 N
Max. force for press fits (static) 80 N
(static, shaft supported) 0 N
Max. radial load 2.7 N, 5 mm from flange
Other specifications
Number of pole pairs 1
Number of commutator segments 9
Number of autoclave cycles 0
Product
Weight 42 g
  • Operating Range

    Continuous operation range
   
     
    Short term operation range
   

Description

maxon DC motors are high-quality motors equipped with powerful permanent magnets. The centerpiece of the motor is the globally patented ironless rotor. Our precious metal brushed combination ensures a high level of consistency of the low contact resistance, even after a long standstill. The motors operate with small startup voltages and extremely low levels of electrical interference.

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