Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X250-30S
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X250-30S is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø140mm bore and 250mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ140 mm
- Full stroke250 mm
- Port sizePT3/8
- Adjuster threadM27×2.0
About the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X250-30S
The ACQJ140X250-30S is a double-acting JIS compact cylinder featuring an external threaded stop with a lock nut that limits the extend stroke. You can fine-tune the extend end position on the machine without swapping parts, yielding a usable extend range of 220 to 250 mm. The retract stroke remains completely unaffected by this adjustment. As a big-bore compact option, it supports up to 300 mm standard strokes.
Because the adjuster only alters travel length and not the piston area, the output force is identical to a standard ACQ of the same bore. At 0.5 MPa it delivers 7696.9 N of push force and 7294.8 N of pull force. The unit uses fixed elastomer NBR bumpers at both ends for end-of-stroke deceleration rather than adjustable air cushions. Equipped with the -S magnet, the integrated grooves accept both reed and electronic solid-state switches for position sensing.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X250-30S Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X250-30S |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø140 mm |
| Full stroke | 250 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 (Ø140mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 7697 N | 7295 N |
| 0.7 MPa | 10776 N | — |
| Max (@1.0 MPa) | 1570 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 ACQJ140X250-30S
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 140 | Bore size in mm. |
| ×250 | 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 ACQJ140X250-30S Is Used
Press Tonnage Setup
Dial in the exact 220 to 250 mm extend position during press tooling setup, allowing rapid tonnage adjustments without machining new spacer rings.
Automotive Welding Line
Accommodate varying vehicle model track widths on a welding fixture by turning the external M27x2.0 stopper to shift the clamping endpoint quickly.
Large Pallet Forming
Test different pallet plate heights on a large forming press by shortening the extend stroke by up to 30 mm, finding the optimal compaction distance.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ140X250-30S the Right Cylinder?
Selecting this 140 mm bore cylinder provides 7696.9 N push at 0.5 MPa. If your application requires less force, stepping down to the 125 mm bore yields 6135.9 N push, while moving up to the 160 mm bore offers 10053.1 N push. If the exact 250 mm extend position is fixed and never needs on-machine tweaking, a standard ACQ cylinder will suffice. When ordering, confirm the 140 mm bore, 250 mm full stroke, 30 mm adjustment window, -S magnet for sensing, and the default female M22x2.5 rod-end thread. Remember that a plain compact cylinder will not hold a load on air loss; for fail-safe holding, specify an external rod lock or pilot-operated check valve.
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 ACQJ140X250-30S FAQ
This 140 mm bore cylinder generates 7696.9 N push and 7294.8 N pull at 0.5 MPa, and 10775.7 N push at 0.7 MPa. The maximum push is 1570 kgf at 1.0 MPa. The full stroke is 250 mm, and with the 30 mm window, the usable extend range is 220 to 250 mm.
The external M27x2.0 threaded stop with a lock nut limits only the extend travel, leaving the retract stroke unchanged. The force remains identical to a standard ACQ because the piston area is not altered. Deceleration is handled by fixed elastomer NBR bumpers at both ends, not adjustable air cushions, so external shock absorbers are recommended for high-energy loads.
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