Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X75-50S
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X75-50S is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø125mm bore and 75mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ125 mm
- Full stroke75 mm
- Port sizePT3/8
- Adjuster threadM27×2.0
About the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X75-50S
The AirTAC ACQJ125X75-50S is a double-acting, single-rod JIS compact cylinder from the big-bore range, featuring an external threaded stop with a lock nut that limits the extend end position. You can fine-tune the forward stroke on the machine itself within a usable range of 25 to 75 mm, while the retract stroke remains completely unaffected.
Because the piston area stays the same, output force is identical to a standard ACQ of this size, delivering 6135.9 N push at 0.5 MPa. The unit incorporates fixed NBR elastomer bumpers at each end for end-of-travel deceleration and includes a built-in piston magnet (-S) for use with reed or solid-state electronic switches.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X75-50S Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X75-50S |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø125 mm |
| Full stroke | 75 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 ACQJ125X75-50S
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×75 | 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 ACQJ125X75-50S Is Used
Heavy Press Tonnage Setup
Dialing in the exact extend contact point on a large metal-forming press during initial tool setup, preventing over-travel before final lock-down.
Automotive Welding Fixture Changeover
Adapting clamp reach on an automotive assembly line when switching between vehicle chassis models, using the external stop to set new safe end positions.
Pallet Lift Height Tuning
Setting precise lifting heights for varying pallet sizes in a heavy-duty conveyor system, adjusting the upward travel limit without changing cylinder hardware.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X75-50S the Right Cylinder?
When sizing this big-bore 125 mm unit, consider the neighboring bores for force scaling: the 100 mm bore yields 3927.0 N push, whereas the 140 mm bore provides 7696.9 N push at 0.5 MPa. If your application never requires end-position adjustments, a fixed-stroke ACQ cylinder provides the same holding force in a simpler setup. To order, confirm the 125 mm bore, 75 mm full stroke, 50 mm adjuster window, the -S magnet option, and the default female M22x2.5 rod-end 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 ACQJ125~160 Adjustable Compact Cylinder ACQJ125X75-50S FAQ
This cylinder delivers 6135.9 N push and 5733.8 N pull at 0.5 MPa, 8590.3 N push at 0.7 MPa, and a maximum push of 1251 kgf at 1.0 MPa. The full stroke is 75 mm with a 50 mm adjuster window, allowing a usable extend range of 25 to 75 mm.
The external M27x2.0 threaded stop with a lock nut limits only the extend length, meaning force remains identical to a standard ACQ since piston area is unchanged. The cylinder uses fixed elastomer bumpers for deceleration; it will not hold a load on air loss, so an external rod lock or pilot-operated check valve is required for fail-safe holding.
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1-Year Warranty
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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