Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X250-30S
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X250-30S is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø125mm bore and 250mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ125 mm
- Full stroke250 mm
- Port sizePT3/8
- Adjuster threadM27×2.0
About the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X250-30S
The AirTAC ACQJ125X250-30S 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 usable extend stroke from 220 mm up to the full 250 mm directly on the machine, while the retract stroke remains completely unaffected. A 30 mm adjustment window is built into this 250 mm full stroke model.
Because the piston area stays constant, the output force is identical to a standard ACQ of the same bore. At 0.5 MPa it delivers 6135.9 N of push force and 5733.8 N of pull force, peaking at 1251 kgf maximum push at 1.0 MPa. The Ø32 mm rod uses an M22x2.5 female thread, and the body incorporates fixed elastomer bumpers rather than adjustable air cushions. An integrated magnet (-S) allows tracking via reed or solid-state switches.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X250-30S Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X250-30S |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø125 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 (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 ACQJ125X250-30S
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 125 | 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 ACQJ125X250-30S Is Used
Heavy Press Tuning
Dial in the exact 220-250 mm extend position during heavy press setups without machining new spacers or swapping cylinders for different material thicknesses.
Large Fixture Changeover
Adjust the end stop on the fly when changing large machining fixtures, accommodating varying part dimensions while maintaining 6135.9 N of thrust.
Platen Positioning
Set precise lower platen limits on molding or forming equipment, using the M27x2.0 adjuster to find the optimal trial end position before locking the nut.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X250-30S the Right Cylinder?
Selecting this 125 mm bore provides 6135.9 N push force at 0.5 MPa; stepping down to a 100 mm bore yields 3927.0 N, while stepping up to a 140 mm bore provides 7696.9 N. If the application never requires end-position tuning, a fixed-stroke ACQ cylinder is sufficient. When ordering, verify the bore, 250 mm full stroke, 30 mm window, -S magnet, and female rod thread to ensure proper fit.
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 ACQJ125X250-30S FAQ
It provides 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 250 mm with a 30 mm window, allowing an adjustable usable extend range of 220-250 mm.
An external M27x2.0 threaded stop and lock nut mechanically limits the extend length, meaning force stays identical to a standard ACQ since piston area is unchanged. The cylinder uses fixed elastomer bumpers for end-of-stroke deceleration rather than adjustable air cushions, and the -S magnet supports both reed and solid-state sensors.
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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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