Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X50-50S
The AirTAC Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X50-50S is a genuine double-acting COMPACT (JIS) cylinder with an EXTERNAL adjustable stop on the extend stroke — a Ø125mm bore and 50mm full stroke. Turn the stop to fine-tune the end position on the machine without changing parts.
- BoreØ125 mm
- Full stroke50 mm
- Port sizePT3/8
- Adjuster threadM27×2.0
About the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X50-50S
The ACQJ125X50-50S is a double-acting JIS compact cylinder featuring a 125mm bore and an external extend stop. An M27x2.0 threaded adjuster with a lock nut allows you to fine-tune the extend end position on the machine, providing a usable extend range of 0-50mm from the 50mm full stroke. The retract stroke remains completely unaffected by this mechanism.
Because the adjustment only limits travel and not piston area, output force stays identical to a standard ACQ of this size, generating 6135.9N push at 0.5MPa. This big-bore variant handles up to 300mm strokes and includes a -S piston magnet for positioning feedback. It uses fixed NBR elastomer bumpers at both ends for end-of-stroke deceleration rather than adjustable air cushions.
Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X50-50S Technical Specifications
| Model | Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X50-50S |
|---|---|
| Series | ACQJ JIS compact adjustable-stroke cylinder |
| Bore size | Ø125 mm |
| Full stroke | 50 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 ACQJ125X50-50S
| ACQJ | JIS compact double-acting ADJUSTABLE-STROKE cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×50 | 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 ACQJ125X50-50S Is Used
Press Fit Depth Tuning
Dial in exact insertion depths on heavy assembly presses without machining new spacers, using the external stop to test different end positions.
Large Fixture Changeover
Adapt big-bore clamping actuators to varying jig heights during product line changeovers by simply rotating the extend adjuster screw.
Heavy Lifting End Stops
Set precise upper lift limits for heavy material handling platforms, relying on the 5733.8N pull force to raise loads safely.
Is the Airtac ACQJ125~160 Adjustable Compact Cylinder ACQJ125X50-50S the Right Cylinder?
Selecting this 125mm bore provides massive thrust (1251kgf max at 1.0MPa). If you do not require on-machine extend tuning, a fixed-stroke ACQ cylinder will deliver the same power in a simpler package. When sizing neighbours, stepping down to a 100mm bore yields 3927.0N push, while no larger standard bore exists in this range. Confirm your ordering essentials: 125mm bore, 50mm full stroke, 50mm window, the -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 ACQJ125X50-50S FAQ
This cylinder delivers 6135.9N push and 5733.8N pull at 0.5MPa, 8590.3N push at 0.7MPa, and a maximum push of 1251kgf at 1.0MPa. The 50mm full stroke has a 50mm adjustment window, allowing the usable extend range to be set anywhere from 0 to 50mm.
No, the external M27x2.0 stop limits extend travel only, so force remains identical to a standard ACQ. It relies on fixed NBR elastomer bumpers for deceleration, not an adjustable air cushion or load-holding brake. For fail-safe load holding on air loss, use an external rod lock.
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Related AirTAC ACQJ Compact Cylinders
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