This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is ASE40X25B — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the ASE40X25B in place of this model. The ACE replacement is a current-production ISO 21287 compact cylinder in the same bore, stroke and force class, with a matching short body and the same mounting-accessory family, so it fits the same envelope. Confirm mounting-interface dimensions against the ACE datasheet before ordering.
Airtac ASP Single Acting Guided Compact Cylinder ASP40X25B
The AirTAC Airtac ASP Single Acting Guided Compact Cylinder ASP40X25B is a single acting, push (spring return) DIN-standard tight/compact air cylinder with a Ø40mm bore and 25mm stroke, 1/8" air ports and a hard-anodized aluminium body. This model is discontinued — the current-production replacement is the ASE40X25B (ISO 21287 ACE), in the same bore, stroke and force class.
- BoreØ40 mm
- Stroke25 mm
- Port size1/8"
- Acting typeSingle acting, push (spring return)
- Rod threadM8×1.25
- StatusDiscontinued → ASE40X25B
About the Airtac ASP Single Acting Guided Compact Cylinder ASP40X25B
The ASP40X25B is a single acting push, spring-return compact cylinder: air extends the 12 mm rod and an internal spring retracts it, so one air line is all the plumbing needs. At the 40 mm bore it delivers 556.8 N of push at 0.5 MPa (808.1 N at 0.7 MPa), already net of the spring, with a minimum working pressure of 0.2 MPa. The B code gives a male rod thread and the port is 1/8". Note that this model is discontinued; the current-production drop-in is the ASE40X25 (swap the P for an E), so confirm the ISO 21287 mounting dimensions before you swap.
The short ISO 21287 body saves roughly 50% of the mounting length of an ISO 15552 profile cylinder, which is why it slots into tight fixtures, guards and gantries. In practice, plan on about 334 N of usable push at 0.5 MPa - roughly 34 kg - rather than the full rating, and for a vertical lift keep to about 28 kg with a 2:1 margin. The hard-anodized aluminium body carries a fixed TPU bumper at both ends, and the rod is S45C with hard chrome. If you need position feedback, order the -S variant to add the optional magnet for CMSE / DMSE switches; this version has no magnet fitted.
Airtac ASP Single Acting Guided Compact Cylinder ASP40X25B Technical Specifications
| Model | Airtac ASP Single Acting Guided Compact Cylinder ASP40X25B |
|---|---|
| Series | ASP DIN compact cylinder (discontinued) |
| Replacement | ASE40X25B |
| Bore size | Ø40 mm |
| Stroke | 25 mm |
| Acting type | Single acting, push (spring return) |
| Port size | 1/8" |
| Rod thread | M8×1.25 |
| 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 bumper (both ends) |
| Max standard stroke | Up to 25 mm |
Specifications follow the official AirTAC ACP datasheet (now discontinued). The ASE40X25B (ISO 21287) carries the same bore/stroke/force class; confirm mounting-interface dimensions against the ACE datasheet before installation. Rod type: female thread (blank) or male thread (B). Thread options: PT (blank) / G.
Theoretical Output Force (Ø40mm)
| Pressure | Push force (spring return) |
|---|---|
| 0.5 MPa | 556.8 N |
| 0.7 MPa | 808.1 N |
Single-acting push: air extends the rod; the return spring retracts it. Forces already net the spring; minimum working pressure is 0.2 MPa.
Model Code: Airtac ASP Single Acting Guided Compact Cylinder ASP40X25B
| ASP | DIN compact cylinder (single-acting push, spring-return, discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×25 | Stroke length in mm. |
| S | Optional built-in magnet for sensor position sensing (omit for no magnet). |
| B | Rod type: B = male thread; blank = female thread. |
Replacement mapping (swap P for E): ACP→ACE, ASP→ASE, ATP→ATE, ACPD→ACED, ACPJ→ACEJ. ACP-family: ACP (double acting), ASP / ATP (single acting push / pull), ACPD (double rod), ACPJ (adjustable stroke).
Where the Airtac ASP Single Acting Guided Compact Cylinder ASP40X25B Is Used
Bench press ejection
Ejects stamped brackets off a small die on a bench press, using the 556.8 N push at 0.5 MPa and the spring return to clear the part automatically when air drops.
Fixture clamp on a CNC jig
Clamps aluminium housings into a CNC drilling jig; the 25 mm stroke and short ISO 21287 body fit under the jig top plate where a full-length cylinder cannot.
Carton hold-down on a sealing head
Holds carton flaps down at a semi-automatic taping station; the spring return lifts the pad the moment the operator releases the valve.
Replacing the Airtac ASP Single Acting Guided Compact Cylinder ASP40X25B with the ASE40X25B
Compare by force: the 32 mm bore gives 352.5 N at 0.5 MPa, while stepping up to 50 mm raises it to 875.5 N - pick 40 mm when your clamp or eject load sits between those. Because the spring drives the rod home on air loss, this cylinder returns to the retracted position rather than holding a mid-stroke point. FA/FB flange, LB foot and CA/CB clevis mountings bolt to the ISO 21287 face, and the male rod thread (B code) suits external rod knuckles. Order ASP40X25BS instead if you want the optional magnet for CMSE / DMSE sensors, and specify the ASE40X25 as the current replacement.
Replacement checklist
- ✓ Current-production ACE → ASE40X25B
- ✓ Same bore / stroke / force class
- ✓ Confirm ISO 21287 mounting dimensions
- ✓ Port/thread type (PT / G)
- ✓ Add -S for magnet if you need sensors
Airtac ASP Single Acting Guided Compact Cylinder ASP40X25B FAQ
It is a single acting push, spring-return cylinder. Push is 556.8 N at 0.5 MPa and 808.1 N at 0.7 MPa, both already net of the return spring. Operating pressure is 0.2-1.0 MPa (28-145 psi) with a 1.5 MPa (215 psi) proof rating, air filtered to 40 um, speed 50-500 mm/s and temperature -20 to +70 C. The 0.2 MPa minimum is what it takes to beat the spring.
The ISO 21287 short body saves about 50% of the mounting length of an ISO 15552 profile cylinder, and FA/FB flange, LB foot and CA/CB clevis brackets bolt to the same face. Sensors are possible only on the -S version, which carries the optional magnet for CMSE / DMSE switches; this model has no magnet. The ASP40X25B itself is discontinued - the ASE40X25 is the current drop-in, so confirm the ISO 21287 mounting dimensions before swapping.
Request a Quote for the ASE40X25B
Send us the quantity and destination. We confirm price, stock and lead time on the ASE40X25B replacement — usually within 7-8 hours.