Short-stroke solenoids for tight installation situations

Small Push Pull Solenoids

  • Compact design
  • Holding force up to 55N
  • Stroke up to 6 mm
  • Fast response time
  • Description
  • Good to know

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Small Push Pull Solenoids - very high holding force

The push-pull solenoids feature an intelligent solenoid concept that enables a very high holding force with comparatively low power consumption. This makes them ideal for heavy-duty applications and those requiring low power consumption or low heat dissipation. Our short-stroke solenoids are divided into two product groups: "Push-Pull" and "Small Push-Pull" solenoids; the difference between the two versions is in size and mounting. Small push-pull solenoids have threaded holes in the base plate, while push-pull solenoids have mounting bolts. Like other linear solenoids, push-pull linear solenoids are on/off actuators that develop a force in one direction when energized. The return force must be provided externally, e.g. by a return spring.

1. Design and Features
The small push-pull solenoids have the same features as the conventional push-pull solenoid. The push-pull solenoid design utilizes a coil with the maximum amount of magnet wire in the smallest amount of space. This coil assembly is then packaged in a metal housing using highly permeable steel to obtain the maximum force in the minimum size and weight. This small size solenoid is a very cost-effective solution when small movements are required and/or limited amount of electrical power is available.

2. Stroke and Force
The conical pole piece configuration is the standard design for the small push-pull solenoid. For the best performance efficiency, the stroke should be kept to a minimum.

3. Operational Consideration
A) Temperature
The coil data of small push-pull solenoids shows the values at ambient temperature 20°C and without the use of a heat sink. If a solenoid is used at a rating shown in the coil data, it is designed so that the coil temperature rises and reaches equilibrium at approximately 85°C. In applications where the ambient temperature is higher than 20°C possible thermal damage can occur. Temperature rise tests should be performed by the customer to assure that the coil does not reach 120°C. Coils can be constructed to operate at temperatures higher than 120°C without thermal damage. Please consult the factory for details.
B) Air Gap Spacer
The small push-pull solenoid uses an air gap spacer between the armature and the case. This spacer is installed to prevent the armature and base from coming into mechanical contact with each other, would cause residual magnetism.
C) Return Spring
The small push-pull solenoid does not include a return spring. Therefore, the application must include a return spring.
D) Shaft Modification
It is not recommended that the customer modify the shaft, as the shafts are fabricated before assembly. Any special configuration can be supplied. Please consult factory for details.
E) Installation of Solenoid
The small push-pull solenoid uses tapped holes for mounting in the base. Caution needs to be observed that the mounting screws used to attach these solenoids are the correct length so as not to damage the coil.

4. General Characteristics
Insulation class: Class E (120°C), Size 110C is class A (105°C), Lead wire class A (105°C)
Dielectric strength: AC 1000V 50/60 Hz 1 min. (at normal temperature and normal humidity)
Insulation resistance: More than 100 Megohm at DC 500V megger (at normal temperature and normal humidity)
Expected life Standard life: 5 million cycles (Solenoid cycle life is very dependent upon side load, frequency of use, and environmental conditions. Cycle life tests should be performed by the customer.)

5. How to Select a Solenoid
Before selecting a small push-pull solenoid, the following information must be determined:
A) Force
The actual force required in the application should be increased using a safety factor multiplier of 1.5 to arrive at the force value that should be used in your specification.
B) Duty Cycle
Use the aforementioned formula to calculate duty cycle. Also note the maximum on time.
C) Stroke
Stroke is determined by application and requirements.
D) Operating Voltage
Operating DC voltage is determined by the application and voltage available. After determining these specifications, one can find the correct size solenoid for the application, using the force-stroke characteristic tables and graphs. The coil data is also shown for different sizes of magnet wire. If the exact operating voltage is not in the coil data table, please consult the factory for details. To determine the force output of the solenoid after temperature rise, please use the amp-turn force graphs after calculating the amp-turns.

6. Ordering information
When ordering a small push-pull solenoid, the correct part number needs to be determined from the following combination of characteristics(1-3):
(1) M-Metric thread or F-SAE thread
(2) Solenoid size (example-144C)
(3) Coil voltage from tables (At 100% duty cycle)
Example of a complete part number.
(1) (2) (3)
M 144C-6V
This part number is for a solenoid with Metric threads, size 144C,with a 6V coil.

Article No. Stroke Force 10% ED Force 100% ED Dimensions Feature/Option Images 3D Data sheet Enquiry Wishlist
110C 2mm 4.5N 1.5N 11x13mm Various windings Enquiry Enquiry
141C 3mm 15N 5N 14x14mm Various windings Enquiry Enquiry
144C 5mm 12N 6N 14x21mm Various windings Enquiry Enquiry
190C 4mm 15N 5.5N 19x13mm Various windings Enquiry Enquiry
192C 4mm 20N 10N 19x18mm Various windings Enquiry Enquiry
194C 5mm 25N 18N 19x27mm Various windings Enquiry Enquiry
221C 5mm 23N 12N 22x18mm Various windings Enquiry Enquiry
224C 6mm 35N 21N 22x28mm Various windings Enquiry Enquiry
251C 5mm 35N 15N 25x16mm Various windings Enquiry Enquiry
300C 5mm 45N 18N 30x15mm Various windings Enquiry Enquiry
304C 5mm 55N 32N 30x21mm Various windings Enquiry Enquiry