Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X50-30SB
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X50-30SB is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø125mm bore and 50mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ125 mm
- Full stroke50 mm
- Port sizePT3/8
- Adjuster threadM27×2.0
About the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X50-30SB
The ACQJ125X50-30SB is a double-acting JIS compact cylinder from AirTAC's big-bore range, featuring a 125mm bore and a 50mm full stroke. An external threaded stop with a lock nut limits the rod extension, allowing you to set the usable extend range from 20mm up to 50mm directly on the machine. The retract stroke remains completely unaffected by this adjustment.
Because the piston area is unchanged, output force is identical to a standard ACQ of this size, delivering 6135.9N push at 0.5 MPa. This variant includes a male M30x1.5 rod end for direct load coupling and a built-in magnet (-S) for position sensing. It relies on fixed NBR elastomer bumpers at each end for end-of-stroke deceleration rather than adjustable air cushions.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X50-30SB Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X50-30SB |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø125 mm |
| Full stroke | 50 mm |
| Adjuster thread | M27×2.0 |
| Port size | PT3/8 |
| 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 | M22×2.5 (F) / M30×1.5 (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 (Ø125mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 6136 N | 5734 N |
| 0.7 MPa | 8590 N | — |
| Max (@1.0 MPa) | 1251 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 ACQJ125~160 Adjustable Compact Cylinder ACQJ125X50-30SB
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 125 | 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 ACQJ125~160 Adjustable Compact Cylinder ACQJ125X50-30SB Is Used
Press Tool Tryout
Dial in the exact extend stop during stamping press setup, fine-tuning the 20-50mm range to test material clamping depth without swapping mechanical spacers.
Heavy Fixture Changeover
Adapt a large machining center to different part families by rotating the external M27x2.0 adjuster screw to reposition the extend limit for varying workpiece widths.
Pallet Lift Positioning
Accommodate varying pallet thicknesses on a heavy-duty lift station by limiting the upward extend stroke, ensuring gentle contact via the fixed elastomer bumper.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X50-30SB the Right Cylinder?
Selecting this 125mm bore actuator provides substantial power, yielding 6135.9N push and 5733.8N pull at 0.5 MPa. If your application requires less force, dropping to a 100mm bore reduces push to 3927.0N, while stepping up to a 140mm bore increases push to 7696.9N. A fixed-stroke ACQ is sufficient if your end position never varies. Confirm your ordering essentials: 125mm bore, 50mm full stroke, 30mm adjuster window, magnet (-S), and male rod thread (-B).
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 ACQJ125~160 Adjustable Compact Cylinder ACQJ125X50-30SB FAQ
This cylinder delivers 6135.9N push and 5733.8N pull at 0.5 MPa, 8590.3N push at 0.7 MPa, and a maximum push of 1251 kgf at 1.0 MPa. The full stroke is 50mm, and with the 30mm adjustable window, the usable extend range is 20-50mm.
The external M27x2.0 threaded stop with lock nut mechanically limits the extend distance without altering piston area, so force remains identical to a standard ACQ. The cylinder uses fixed elastomer bumpers for deceleration and does not hold the load on air loss; for fail-safe load holding, install an external rod lock or pilot-operated check valve.
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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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