This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is ASE40X20B — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the ASE40X20B 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 ASP40X20B
The AirTAC Airtac ASP Single Acting Guided Compact Cylinder ASP40X20B is a single acting, push (spring return) DIN-standard tight/compact air cylinder with a Ø40mm bore and 20mm stroke, 1/8" air ports and a hard-anodized aluminium body. This model is discontinued — the current-production replacement is the ASE40X20B (ISO 21287 ACE), in the same bore, stroke and force class.
- BoreØ40 mm
- Stroke20 mm
- Port size1/8"
- Acting typeSingle acting, push (spring return)
- Rod threadM8×1.25
- StatusDiscontinued → ASE40X20B
About the Airtac ASP Single Acting Guided Compact Cylinder ASP40X20B
The ASP40X20B is a single acting push cylinder with spring return: air extends the 12 mm rod and the internal spring retracts it, so one air line is enough. At 0.5 MPa this 40 mm bore delivers 556.8 N of push, already net of the spring, and 808.1 N at 0.7 MPa; it needs just 0.2 MPa to overcome the spring. The male rod thread (B code) bolts straight to I/Y knuckles. Note this model is discontinued - the current-production replacement is the ASE40X20 (swap the P for an E), which matches the same bore, stroke and force class.
The hard-anodized aluminium body is a short ISO 21287-style compact build that saves about 50% of the mounting length of an ISO 15552 profile cylinder, so it slots into tight fixtures, guards and gantries. Fixed TPU bumpers at both ends absorb end-of-travel impact. A practical sizing check: halving the 556.8 N figure gives roughly 28 kg of vertical lift with a 2:1 margin, enough to raise a small die or fixture lid. No magnet is fitted on this code - order the -S variant if you want CMSE / DMSE switch sensing.
Airtac ASP Single Acting Guided Compact Cylinder ASP40X20B Technical Specifications
| Model | Airtac ASP Single Acting Guided Compact Cylinder ASP40X20B |
|---|---|
| Series | ASP DIN compact cylinder (discontinued) |
| Replacement | ASE40X20B |
| Bore size | Ø40 mm |
| Stroke | 20 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 ASE40X20B (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 ASP40X20B
| ASP | DIN compact cylinder (single-acting push, spring-return, discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×20 | 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 ASP40X20B Is Used
Fixture clamping on CNC jigs
Springs the clamp arm back the instant air drops, clearing the machining envelope on milling fixtures without a second valve port.
Carton kick-off at packers
A 20 mm push stroke nudges cartons off a conveyor lane at up to 500 mm/s; the spring return resets the pusher between cycles.
Lifting small fixture lids
With about 28 kg of vertical lift at a 2:1 margin, it raises light guards or lids on test benches, retracting automatically on vent.
Replacing the Airtac ASP Single Acting Guided Compact Cylinder ASP40X20B with the ASE40X20B
Size by force: the 32 mm bore gives 352.5 N at 0.5 MPa and the 50 mm bore gives 875.5 N, so pick the 40 mm when your clamping or pressing load sits between them. Because the spring drives the rod home on air loss, this cylinder retracts to its rest position rather than holding a mid-stroke setting. Match FA/FB flange, LB foot or CA/CB clevis brackets to your fixture, and add the -S code only if position sensing is needed. For new projects, specify the ASE40X20 instead and confirm the ISO 21287 mounting dimensions before swapping.
Replacement checklist
- ✓ Current-production ACE → ASE40X20B
- ✓ 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 ASP40X20B FAQ
Push is 556.8 N at 0.5 MPa and 808.1 N at 0.7 MPa, both already net of the return spring. Minimum working pressure is 0.2 MPa (28 psi) to beat the spring; the range is 0.2-1.0 MPa (28-145 psi) with a 1.5 MPa (215 psi) proof pressure. Speed is 50-500 mm/s and the fluid is air filtered to 40 um.
No - the ASP40X20B is discontinued. The current-production drop-in is the ASE40X20 (swap the P for an E), which keeps the same 40 mm bore, 20 mm stroke and force class in the short ISO 21287 body. Confirm the ISO 21287 mounting dimensions against your fixture before swapping, and note the male rod thread and 1/8" port carry over.
Request a Quote for the ASE40X20B
Send us the quantity and destination. We confirm price, stock and lead time on the ASE40X20B replacement — usually within 7-8 hours.