Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X40-40S
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X40-40S is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø125mm bore and 40mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ125 mm
- Full stroke40 mm
- Port sizePT3/8
- Adjuster threadM27×2.0
About the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X40-40S
The AirTAC ACQJ125X40-40S is a double-acting JIS compact cylinder featuring a 125mm bore and a 40mm full stroke. An external M27x2.0 threaded stop with a lock nut restricts the forward extend position, yielding a usable extend range of 0 to 40mm. The return stroke remains completely unaffected by this adjustment.
Because the internal piston area stays constant, output force equals that of a standard ACQ variant, delivering 6135.9N push and 5733.8N pull at 0.5MPa. This big-bore unit includes a female M22x2.5 rod-end thread, a PT3/8 port, and a built-in piston magnet for position sensing. Fixed NBR elastomer bumpers absorb impact energy at both travel ends.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X40-40S Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X40-40S |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø125 mm |
| Full stroke | 40 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 ACQJ125X40-40S
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×40 | 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 ACQJ125X40-40S Is Used
Heavy Press Tooling
Dial in the exact clamping reach during new die setup on large metalforming presses without machining custom spacers.
Pallet Changeover Stops
Modify the extend endpoint rapidly on packaging lines when switching between different pallet widths or product sizes.
Prototype Positioning
Establish optimal trial end positions for testing new automated assembly stations before finalizing mechanical hard stops.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X40-40S the Right Cylinder?
If your setup requires less thrust, stepping down to the 100mm bore yields 3927.0N push at 0.5MPa, whereas moving up to the 160mm bore provides 10053.1N push. A fixed-stroke ACQ is sufficient if your end position never varies. When ordering, verify the 125mm bore, 40mm full stroke, 40mm adjustment window, the -S magnet for electronic or reed switches, and the female M22x2.5 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 ACQJ125~160 Adjustable Compact Cylinder ACQJ125X40-40S FAQ
At 0.5MPa, push force is 6135.9N and pull force is 5733.8N. At 0.7MPa, push force is 8590.3N. The maximum push force is 1251kgf at 1.0MPa. The full stroke is 40mm, and the external adjuster allows the extend stroke to be shortened by up to 40mm, giving a usable extend range of 0 to 40mm.
The external M27x2.0 threaded stop physically limits how far the rod extends, but it does not change the piston area, so force remains identical to a standard ACQ. Fixed elastomer bumpers decelerate the load at both ends. Note that this cylinder will not hold its load on air loss; for a fail-safe hold, install an external rod lock.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC ACQJ Compact Cylinders
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