Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-40SB
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-40SB is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø40mm bore and 250mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ40 mm
- Full stroke250 mm
- Port sizePT1/8
- Adjuster threadM12×1.25
About the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-40SB
The ACQJ40X250-40SB is a double-acting JIS compact cylinder with an external extend stop, built for a 40mm bore. A threaded rod-end adjuster with lock nut lets you dial in the extension end position on the machine, yielding a usable extend range of 210-250mm from a 250mm full stroke. Retraction travel remains fixed at the original 250mm.
Because the piston area stays constant, output force matches a standard ACQ exactly: 628.3N push and 527.8N pull at 0.5MPa. This made-to-order 250mm unit exceeds the 100mm standard stroke limit for this bore size. It includes a male M14x1.5 rod end and a piston magnet for reed or solid-state sensors, while fixed NBR bumpers handle end deceleration.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-40SB Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-40SB |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø40 mm |
| Full stroke | 250 mm |
| Adjuster thread | M12×1.25 |
| Port size | PT1/8 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 500 mm/s |
| Rod thread | M8×1.25 (F) / M14×1.5 (B) |
Specifications follow the official AirTAC ACQJ datasheet. The adjustable stop shortens the EXTEND stroke only; the piston area — and therefore the force — is the same as a standard ACQ of this bore. Adjustable window options: 10/20/30/40/50/75/100 mm.
Theoretical Output Force (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 kgf | |
Force equals a standard ACQ of the same bore — the adjuster changes stroke length, not piston area. Actual usable force is lower due to friction; size with a safety margin.
Model Code: Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-40SB
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×250 | Full stroke length in mm. |
| -0 | Adjustable window in mm (extend stroke can be shortened by up to this). |
| S / B | Magnet (S) / male-thread rod (B); omit for none / female thread. |
Thread: PT standard (G / NPT available). Related: ACQ (fixed stroke), ACQD (double rod), TACQ (guided / non-rotating).
Where the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-40SB Is Used
Product Changeover Stops
Quickly modify the extend endpoint on packaging lines when switching carton sizes, avoiding the need to swap out physical cylinder spacers.
Trial End Positions
Dial in the exact clamping reach on CNC fixtures during first-article runs, testing different depths before locking the nut down.
Setup-Varying Assembly Jigs
Adapt pressing strokes on the fly for multi-part assemblies, using the 210-250mm range to accommodate varying component heights.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-40SB the Right Cylinder?
Choosing this 40mm bore gives 628.3N push at 0.5MPa. Dropping to a 32mm bore reduces push to 402.1N, whereas a 50mm bore raises it to 981.8N. A standard non-adjustable ACQ40 is adequate if your extend position never needs field tuning. When ordering, confirm the 250mm stroke, 40mm adjustment window, S magnet, and B male rod thread.
Quick checklist
- ✓ Need on-machine end-position tuning?
- ✓ Full stroke and adjust window (mm)
- ✓ Force at your working pressure
- ✓ 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 0.15 – 1.0 MPa operating pressure.
- check Lock the adjuster nut after setting the stop.
- check The stop limits the EXTEND stroke only.
- check Avoid side load on the short piston rod.
- check Installation by qualified personnel per AirTAC docs.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X250-40SB FAQ
The usable extend range is 210-250mm (250mm full stroke minus a 40mm window). It delivers 628.3N push and 527.8N pull at 0.5MPa, 879.6N push at 0.7MPa, and a maximum push of 128kgf at 1.0MPa. The retract stroke remains the full 250mm.
No, the M12x1.25 external threaded stop only limits extension travel, so force is identical to a standard ACQ. The fixed NBR bumpers decelerate the load near stroke ends but do not hold position on air loss; for fail-safe load holding, add an external rod lock.
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Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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Related AirTAC ACQJ Compact Cylinders
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