Airtac SSA Single-Acting Compact Cylinder SSA40X20B
The AirTAC Airtac SSA Single-Acting Compact Cylinder SSA40X20B is a genuine single-acting COMPACT cylinder (single acting, push type) with a Ø40mm bore and 20mm 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
- Stroke20 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 SSA40X20B
The AirTAC SSA40X20B is a compact single-acting push-type cylinder where air pressure extends the rod and an internal mechanical spring retracts it. It generates 545.6 N of net push at 0.5 MPa, a figure that already accounts for the return spring force. This 40 mm bore model features a 16 mm piston rod and a male M14x1.5 thread, making it robust enough for heavy short-stroke ejection tasks.
Because it requires only one air line and a single solenoid port, plumbing is vastly simplified and fitting costs drop. The short riveted body minimizes axial mounting depth in crowded machinery. End-of-stroke deceleration is handled by a fixed NBR bumper, which absorbs shock but is not an adjustable cushion.
Airtac SSA Single-Acting Compact Cylinder SSA40X20B Technical Specifications
| Model | Airtac SSA Single-Acting Compact Cylinder SSA40X20B |
|---|---|
| Series | SSA compact single-acting cylinder |
| Bore size | Ø40 mm |
| Stroke | 20 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 SSA40X20B
| SSA | Compact single acting, push type cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×20 | 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 SSA40X20B Is Used
Heavy-Duty Stamping Ejector
Uses the 545.6 N net push at 0.5 MPa to eject thick metal blanks from a die, relying on the male M14x1.5 rod for secure tooling attachment.
Pallet Diverter Gate
Extends 20 mm to push heavy pallets onto a secondary line, with the spring safely retracting the mechanism when air is released.
Component Sealing Press
Applies a steady clamping force to seat bearings, taking advantage of the compact riveted body to fit within tight machine frames.
Is the Airtac SSA Single-Acting Compact Cylinder SSA40X20B the Right Cylinder?
When sizing this model, evaluate the adjacent bores: the SSA32 provides 346.6 N at 0.5 MPa, while the SSA50 offers 874.7 N at 0.5 MPa. For the SSA40X20B, a safe working load is roughly 327 N (about 60% of the 545.6 N figure), translating to a vertical lift capacity of approximately 27.8 kg with a 2:1 safety margin. Note the 30 mm maximum standard stroke ceiling.
This configuration includes the B option, meaning the 16 mm rod utilizes a male M14x1.5 thread instead of the default female M8x1.25. The air port is PT1/8. Since this SKU lacks the S option, it has no piston magnet and cannot support reed or electronic switches. Remember that upon air loss, the spring drives the rod back to rest; it will not hold a mid-stroke load without external locking.
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 SSA40X20B FAQ
The net push force is 545.6 N at 0.5 MPa and 796.9 N at 0.7 MPa. These values already subtract the return spring force. Operating pressure must be between 0.2 and 1.0 MPa, with a minimum of 0.2 MPa required to overcome the spring.
No, this specific SKU does not include the S option, so it lacks a piston magnet and cannot accept reed or electronic switches. You would need the SSA40X20BS variant for position sensing capabilities.
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