Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X50-30SB
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X50-30SB is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø40mm bore and 50mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ40 mm
- Full stroke50 mm
- Port sizePT1/8
- Adjuster threadM12×1.25
About the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X50-30SB
The ACQJ40X50-30SB is a double-acting JIS compact cylinder with a 40mm bore and 50mm full stroke. An external M12x1.25 threaded stop and lock nut let you fine-tune the extend end position on the machine, providing a usable forward range of 20 to 50mm. The retract stroke remains completely unaffected by this adjustment. Because the piston area stays constant, output force equals a standard ACQ, delivering 628.3N push and 527.8N pull at 0.5MPa.
This variant includes a built-in piston magnet (-S) for tracking with reed or solid-state switches, plus a male M14x1.5 rod-end thread (-B) for direct load coupling. It features a 16mm piston rod, PT1/8 porting, and fixed NBR elastomer bumpers at both ends for end-of-stroke deceleration. Operating pressure spans 0.15 to 1.0MPa, with a speed range of 30 to 500mm/s.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X50-30SB Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X50-30SB |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø40 mm |
| Full stroke | 50 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 ACQJ40X50-30SB
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×50 | 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 ACQJ40X50-30SB Is Used
Machining Fixture Stops
Dial in the exact clamping reach on a CNC milling fixture without machining new spacers, accommodating various raw casting widths on the same tombstone.
Packaging Format Changeover
Rapidly reposition a carton sealing flap folder for different box heights by turning the external stopper screw, cutting product line setup time from minutes to seconds.
Assembly Press Trial
Safely test and incrementally step through bearing insertion depths on an assembly press to find the optimal seating position before finalizing the mechanical stop.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X50-30SB the Right Cylinder?
Selecting this 40mm bore provides 628.3N push at 0.5MPa, sitting neatly between the 32mm bore (402.1N push) and the 50mm bore (981.8N push). If your extend end position never varies, a fixed-stroke ACQ cylinder is sufficient and simpler. When ordering, confirm the 40mm bore, 50mm full stroke, 30mm adjustment window, the -S magnet requirement, and the -B male M14x1.5 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 ACQJ40X50-30SB FAQ
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 full stroke is 50mm with a 30mm adjustment window, allowing the usable extend range to be set anywhere from 20mm to 50mm.
The external M12x1.25 threaded stop physically limits how far the rod extends, shortening the forward stroke without changing piston area, so force remains identical to a standard ACQ. Fixed NBR bumpers decelerate the piston near travel ends, but a plain cylinder will not hold its load on air loss; use an external rod lock or pilot-operated check valve for fail-safe holding.
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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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