Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X175-20S
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X175-20S is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø125mm bore and 175mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ125 mm
- Full stroke175 mm
- Port sizePT3/8
- Adjuster threadM27×2.0
About the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X175-20S
The AirTAC ACQJ125X175-20S is a double-acting 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 extend stroke on the machine across a 155-175mm usable range (full 175mm minus up to 20mm) without swapping parts. The retract stroke remains completely unaffected. The external adjuster utilizes an M27x2.0 thread.
Because the piston area stays constant, output force is identical to a standard ACQ of this bore size. At 0.5 MPa it yields 6135.9 N push and 5733.8 N pull, reaching 8590.3 N push at 0.7 MPa, with a maximum push of 1251 kgf at 1.0 MPa. The unit incorporates a fixed NBR elastomer bumper at each end for end-of-stroke deceleration and includes a built-in magnet (-S) for position sensing.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X175-20S Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X175-20S |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø125 mm |
| Full stroke | 175 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 ACQJ125X175-20S
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×175 | 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 ACQJ125X175-20S Is Used
Heavy Press Tooling
Dial in the exact 155-175mm extend reach during heavy press setup, allowing precise positioning of large dies without machining custom spacers.
Automotive Component Proving
Establish trial end positions for clamping large automotive castings, tweaking the 20mm window on the fly to test fitment before finalizing the fixturing.
Pallet Changeover Stops
Adapt end-of-stroke stops quickly on packaging palletizers when switching between different pallet heights, using the external M27x2.0 adjuster to match product dimensions.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X175-20S the Right Cylinder?
When sizing this 125mm bore, stepping down to an 80mm bore yields 2513.2 N push at 0.5 MPa, while stepping up to a 160mm bore provides 10053.1 N push. If your extend position never varies, a fixed-stroke ACQ cylinder suffices and avoids the external stopper overhang. To order this adjustable version correctly, confirm the 125mm bore, 175mm full stroke, 20mm window, -S magnet for electronic or reed switches, 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 ACQJ125X175-20S FAQ
The usable extend range is 155-175mm (full 175mm minus a 20mm window). Force is identical to a standard ACQ: push is 6135.9 N and pull is 5733.8 N at 0.5 MPa, push is 8590.3 N at 0.7 MPa, and max push is 1251 kgf at 1.0 MPa. The retract stroke is unaffected.
An external threaded stop with a lock nut limits the extend stroke, meaning force is unchanged because the piston area remains the same. The cylinder uses a fixed NBR elastomer bumper at each end for deceleration rather than an adjustable air cushion. The -S magnet works with reed or solid-state electronic switches.
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1-Year Warranty
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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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