Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X40-30S
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X40-30S 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 ACQJ125X40-30S
The AirTAC ACQJ125X40-30S is a large-bore JIS compact cylinder with a double-acting single rod and an external extend stop. An external threaded adjuster with a lock nut lets you shorten the extend stroke by up to 30 mm. This yields a usable forward range of 10 to 40 mm. The return stroke remains fixed at its original length.
Because the piston area stays constant, output force matches a standard ACQ of this bore exactly. At 0.5 MPa you get 6135.9 N push and 5733.8 N pull force. The body uses fixed elastomer bumpers for end-of-travel deceleration rather than adjustable air cushions. An integrated magnet (-S) enables position sensing with reed or solid-state switches.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X40-30S Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X40-30S |
|---|---|
| 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 ACQJ125X40-30S
| 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 ACQJ125X40-30S Is Used
Press Fit Depth Tuning
Dial in exact pressing distances on heavy assembly lines. The external stop allows operators to shift the 10 to 40 mm forward travel without swapping mechanical spacers.
Heavy Fixture Changeover
Adapt large welding or clamping fixtures to new product heights. Loosen the lock nut to alter the extend endpoint instantly during model line changeovers.
Large Mold Positioning
Test end positions on big plastic or metal molds. The adjuster limits the forward motion to prevent machine damage while finding the optimal contact point.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X40-30S the Right Cylinder?
This 125 mm bore delivers 6135.9 N push at 0.5 MPa. Stepping down to an 80 mm bore yields 2513.2 N, while the larger 140 mm option provides 7696.9 N, helping you match your load requirements. If your setup never needs end-position changes, a fixed-stroke ACQ cylinder is sufficient. When ordering this unit, confirm the 40 mm full stroke, 30 mm 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 ACQJ125X40-30S FAQ
The bore is 125 mm with a 40 mm full stroke. The adjustable window is 30 mm, giving a usable extend range of 10 to 40 mm. Force equals a standard ACQ: 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 port size is PT3/8.
An external M27x2.0 threaded screw with a lock nut limits forward travel. It changes stroke length only, so force is identical to a standard cylinder. The cylinder uses fixed NBR bumpers, not adjustable air cushions. Note that a standard cylinder does not hold its load on air loss; for fail-safe holding, add an external rod lock.
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Genuine AirTAC parts produced by AirTAC factory.
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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