Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-30SB
The AirTAC Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-30SB is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø40mm bore and 300mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ40 mm
- Full stroke300 mm
- Port sizePT1/8
- Adjuster threadM12×1.25
About the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-30SB
The ACQJ40X300-30SB is a double-acting, single-rod JIS compact cylinder engineered for applications requiring precise on-machine extend position tuning. Featuring a 40mm bore and a 300mm full stroke, this long-stroke variant incorporates an external threaded stop with a lock nut. This mechanism allows you to fine-tune the extend end position within a 30mm window, yielding a usable extend range of 270-300mm without changing parts. The retract stroke remains completely unaffected by this adjustment.
Because the adjustment mechanism only limits travel distance and does not alter the piston area, the output force remains identical to a standard ACQ40 cylinder. At 0.5 MPa, it delivers 628.3N of push force and 527.8N of pull force. The unit includes a -S magnet for compatibility with both reed and solid-state electronic switches, and a -B male piston rod end (M14x1.5) for direct load coupling. Deceleration is handled by fixed NBR elastomer bumpers at both ends, operating reliably at speeds of 30-500 mm/s.
Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-30SB Technical Specifications
| Model | Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-30SB |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø40 mm |
| Full stroke | 300 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 ACQJ40X300-30SB
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×300 | 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 ACQJ40X300-30SB Is Used
Multi-Product Machining Changeover
Rapidly adapt stop positions on a machining line when switching between parts of varying lengths, using the external M12x1.25 adjuster to dial in the new 270-300mm extend endpoint.
Package Diverting Setup
Fine-tune the extend position of a diverting arm on a packaging conveyor to handle different carton sizes without needing to swap out the entire pneumatic cylinder assembly.
Prototype End-Stop Testing
Safely determine the optimal extend position for a new automated test fixture by gradually increasing the stroke from 270mm up to the full 300mm limit during initial mechanical trials.
Is the Airtac ACQJ32~40 Adjustable Thin-Type Cylinder ACQJ40X300-30SB the Right Cylinder?
This 40mm bore cylinder provides 628.3N push force at 0.5 MPa. If your application requires less force, the next size down (32mm bore) yields 402.1N push, while stepping up to a 50mm bore provides 981.8N push. Note that the 300mm stroke significantly exceeds the standard 100mm maximum for this bore, making this a made-to-order long-stroke variant. If exact end-position tuning is unnecessary, a fixed-stroke ACQ cylinder will suffice. When ordering, verify the 40mm bore, 300mm full stroke, 30mm adjustable window, the -S magnet requirement, and the -B male M14x1.5 rod thread. The fluid port is PT1/8.
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 ACQJ40X300-30SB FAQ
The usable extend range is 270-300mm (the 300mm full stroke minus the 30mm adjustable window). The force is identical to a standard ACQ40: 628.3N push and 527.8N pull at 0.5 MPa, 879.6N push at 0.7 MPa, and a maximum push of 128 kgf at 1.0 MPa.
The external stop uses an M12x1.25 threaded screw and lock nut to mechanically limit how far the rod extends, changing only the stroke length, not the force. The retract stroke is unaffected. Deceleration relies on fixed NBR elastomer bumpers, not adjustable air cushions. Because this is a plain compact cylinder, it will not hold a load if air pressure is lost; use an external rod lock or pilot-operated check valve for fail-safe holding.
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Related AirTAC ACQJ Compact Cylinders
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