Airtac SSA Single-Acting Compact Cylinder SSA40X25SB
The AirTAC Airtac SSA Single-Acting Compact Cylinder SSA40X25SB is a genuine single-acting COMPACT cylinder (single acting, push type) with a Ø40mm bore and 25mm stroke. Air pushes the rod and an internal spring returns it, so one solenoid line drives the motion — ideal for short-stroke clamping and ejection in tight spaces.
- BoreØ40 mm
- Stroke25 mm
- Port sizePT1/8
- Acting typeSingle acting, push type
- Rod threadM8×1.25 (F) / M14×1.5 (B)
- CushionFixed NBR bumper
About the Airtac SSA Single-Acting Compact Cylinder SSA40X25SB
The AirTAC SSA40X25SB is a 40 mm bore compact single-acting push-type cylinder. Compressed air extends the rod, while an internal mechanical spring handles the retraction. It delivers a true 545.6 N of net push at 0.5 MPa, meaning the force quoted already subtracts the return spring resistance. This unit includes a built-in piston magnet (-S) for position sensing and a male M14x1.5 threaded rod end (-B).
Designed for tight fixtures, the short riveted body significantly cuts axial mounting depth compared to round-body alternatives. You only need one air line and one solenoid port to drive the motion, simplifying plumbing. A fixed NBR bumper decelerates the stroke ends, though it is not an adjustable air cushion or a locking mechanism.
Airtac SSA Single-Acting Compact Cylinder SSA40X25SB Technical Specifications
| Model | Airtac SSA Single-Acting Compact Cylinder SSA40X25SB |
|---|---|
| Series | SSA compact single-acting cylinder |
| Bore size | Ø40 mm |
| Stroke | 25 mm |
| Acting type | Single acting, push type |
| Port size | PT1/8 |
| Rod end thread | M8×1.25 female / M14×1.5 male (B) |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.2 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 50 – 500 mm/s |
| Cushion | Fixed NBR bumper |
| Max standard stroke | Up to 30 mm |
Specifications follow the official AirTAC SDA-family datasheet. Single-acting types start at 0.2 MPa (the spring must be overcome). Confirm against the product label before installation.
Net Output Force (Ø40mm, Push)
| Pressure | Push force (net) |
|---|---|
| 0.5 MPa | 546 N |
| 0.7 MPa | 797 N |
These are NET output forces — the return-spring force is already deducted. Single-acting push only; the spring performs the opposite stroke. Size with a safety margin.
Model Code: Airtac SSA Single-Acting Compact Cylinder SSA40X25SB
| SSA | Compact single acting, push type cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×25 | Stroke length in mm (single-acting max 30 mm). |
| S | Built-in magnet for magnetic-switch sensing (omit = none). |
| B | Male-thread piston rod (omit = female thread). |
Thread: PT standard. SSA pushes out / spring returns; STA pulls in / spring extends. Related: SDA (double acting), SDAD (double rod), SDAJ (adjustable stroke).
Where the Airtac SSA Single-Acting Compact Cylinder SSA40X25SB Is Used
Stamping Pin Ejection
Uses the 545.6 N net extension force to push formed parts out of a die, relying on the compact body to fit within crowded press tooling.
Package Divert Stroke
Extends 25 mm to deflect cartons on a sorting line, with the single air line keeping valve and fitting costs low.
Component Hold-Down
Applies over 796 N of push at 0.7 MPa to secure a workpiece during machining, releasing instantly when air is removed.
Is the Airtac SSA Single-Acting Compact Cylinder SSA40X25SB the Right Cylinder?
When sizing this model, evaluate the adjacent bores. Stepping down, the SSA32 provides 346.6 N of net push at 0.5 MPa. Stepping up, the SSA50 yields 874.7 N at 0.5 MPa. The 545.6 N rating on this 40 mm bore translates to a safe working load of roughly 327 N, or a vertical lift capacity of about 27.8 kg with a 2:1 safety margin. The standard stroke ceiling for this series is 30 mm, and this 25 mm unit fits comfortably within that limit.
Remember that spring-return behavior means the rod cannot hold a mid-stroke load without live air pressure. If power drops, the spring drives the actuator back to its retracted state. This specific configuration confirms a 40 mm bore, 25 mm stroke, PT1/8 port, an integrated magnet for reed or electronic switches, and a male M14x1.5 piston rod.
Quick checklist
- ✓ Net push force at your working pressure
- ✓ Stroke ≤ 30 mm (single-acting limit)
- ✓ Single air line saves a valve/port
- ✓ Magnet (S) for sensors?
- ✓ Female (blank) or male (B) rod thread
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.2 – 1.0 MPa operating pressure.
- check Remember the spring performs the return stroke.
- check Avoid side load on the short piston rod.
- check Front/rear covers are riveted — do not dismantle.
- check Installation by qualified personnel per AirTAC docs.
Airtac SSA Single-Acting Compact Cylinder SSA40X25SB FAQ
This single-acting cylinder provides 545.6 N of net push at 0.5 MPa and 796.9 N at 0.7 MPa. These figures already account for the internal return spring resistance.
No. On air loss, the internal spring drives the rod back to its retracted position. It requires at least 0.2 MPa to overcome the spring and does not lock or hold a mid-stroke load.
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Standard models usually ship in 3-4 days.
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