OEM Factory Direct ACA ACJ Series Adjustable Shock Absorber Manufacturer Hydraulic Oil Buffer Damper Compatible With Airtac Wholesale

Product Detailed Description:

The ACA / ACJ Series is an adjustable hydraulic shock absorber with a QPQ-treated integrated outer body and a hardened stainless steel shaft. Engineered as a direct functional replacement for Airtac ACA / ACJ, it delivers identical performance and mounting compatibility at significantly lower cost. The front adjustment knob fine-tunes the damping force for different load and speed conditions, providing smooth, quiet and repeatable deceleration — protecting machines, workpieces and operators from impact shock.

Application Industries

• Automation slide tables & transfer lines — stopping high-speed slides without bounce
• Cylinder end-of-stroke — absorbing the impact of fast-moving cylinders
• Robotic axes & gripper units — smooth deceleration of moving axes
• Packaging machinery — high-cycle indexing and stop units
• Machine tools — tool changer, door and magazine stops
• Conveyor stops & diverters — stopping products and pallets at controlled positions
• Automotive assembly fixtures — locating and clamping stops
• Die-casting & molding peripherals — ejector and part handling stops
• Material handling equipment — hoppers, lifters and rotary stops
• General high-cycle machinery — anywhere a moving load must stop smoothly, quietly and repeatedly

Product feature：

1.Excellent and stable deceleration and shock absorbing; if impacted by load, the resistancewill automatically adjust.

2.Outer body of integrated structure is treated by QPQ, which has optimum corrosion andwear resistance and can withstand high pressure; it is easy to install and adjust for allthreaded outer body which has good heat dissipation.

3. With high hardness stainless steel shaft, the shock absorber has better impact andcorrosion resistance, and it can work under adverse conditions.

4.Special oiling process leads to stable shock absorbing.

5.Compact structure and high max.absorbed energy.

6.we use Special lubricants as buffer medium, which adapts to wide temperature range andensures stable cushioning.

Specification

Customization Options

Product Advantages

• Adjustable damping — front knob fine-tunes the damping force to match load and speed; setting can be locked.
• QPQ-treated integrated body — optimum corrosion and wear resistance, withstands high pressure, easy heat dissipation.
• Hardened stainless steel shaft — high impact and corrosion resistance, works in adverse conditions.
• Stable cushioning — special oiling process and special lubricant as buffer medium give stable performance over a wide temperature range.
• Compact structure — high maximum absorbed energy in a small envelope.
• All-threaded outer body — easy to install and adjust, good heat dissipation during continuous cycling.
• Smooth, quiet stops — reduces machine vibration, noise and workpiece damage.
• Long service life — built for high-cycle automation applications.
• Wide model range — body thread M8–M25, strokes 6–50 mm; slow / medium / fast speed grades.
• Airtac ACA / ACJ compatible — drop-in replacement at factory-direct price.

lnstallation and Operation

1. The scale range of adjustable shock absorbers is 0 to 9(8).Factory set is at 6(4) position.0 means the softest, while 9 means the hardest

2. Correct selection of shock absorbers can ensure a smooth deceleration and good shock absorbing properties;

3. lf there exists rebounding at the beginning of the stroke, it shows the effective weight is too high. in this case, sel-compensationtype shall e replaced by high speed type(-1), while adjustable type shall be adjusted to softer, that is closer to 0;

4. If there exists rebounding at the end of the stroke, it shows the effective weight is too low.In this case, sel-compensation typeshall be replaced by low speed type(-3), while adjustable type shall be adjusted to harder, that is closer to 9;

5. In the work process, lateralload should be avoided as possible as one can.Eccentric angle must be controlled within 3 '.Shook

absorbers shall be securely locked;

6. The operating temperature range shall be -5 to 7o'C;

7. To extend the service life, piston shall be stopped 1mm before reaching the end. lt is better to install set screw with positioningand precise adjustment;

8. If two or more shock absorbers are installed at the same side, please make sure that they act synchronously;

9. No painting, welding or cleaning with corrosive substance on the body as well as the piston rod.

10. when installed the absorber, the moment forced on absorber can't be out of the range given in belowlist or may cause the absorberdamage.

11. Do not keep the piston rod in a compressed state for a long time,as it may affect its lifespan.

12. Do not place external liquids (water, oil) on the piston rod,as it may affect its lifespan.

Maintenance and Care

1. Daily Maintenance Points

• Regularly inspect the appearance, threads, and seals, and promptly clean oil and dust.

• Under high-temperature/high-frequency operating conditions, check the oil level every 3-6 months and replenish or replace as needed.

• Before long-term shutdown, apply anti-rust oil and seal both ends to prevent dust accumulation.

2. Replacement Cycle Reference

• Normal operating conditions: 1-2 years or a cumulative 1 million cycles;

• High-frequency/heavy-load operating conditions: 6-12 months or 500,000 cycles.

FAQ

Q1. What are the core differences between ACA and ACJ?

A1. ACJ is a standard automatic compensation type with a fixed damping force, requiring no manual adjustment. It is suitable for stable operating conditions and scenarios where frequent adjustments are not needed, and installation is simpler. ACJ is an adjustable automatic compensation type with a 0-9 scale adjustment knob at the rear (0 is the softest, 9 is the hardest). The factory default is 6 or 4, which can accurately adapt to different operating conditions according to load and speed.

Q2. What to do if a "rebound" occurs?

A2.Initial rebound during the stroke: Too heavy a load/too fast a speed. Switch to a high-speed model (suffix 1) or adjust the ACJ scale towards 0 (soft).

Rebound at the end of the stroke: Too light a load/too low a speed. Switch to a low-speed model (suffix 3) or adjust the ACJ scale towards 9 (hard).

Q3. How to use the positioning stop nut?

A3. It is used for precise positioning, stopping the piston rod 1mm before it touches the bottom. When used with ACJ/ACA, it can improve positioning accuracy and extend service life.

Q4. What is the applicable temperature range?

A4. Standard range: -5℃ to 70℃. Special material models can be extended to -10℃ to 80℃. For high-temperature applications, select high-temperature resistant seals and lubricants.

Q5. How to avoid failure under high-frequency operating conditions?

A5. Calculate the hourly energy absorbed (energy per cycle × frequency) and ensure it does not exceed the specified limits

When multiple buffers are connected in parallel, ensure synchronized operation to distribute energy;

Regularly clean external dirt, check the condition of seals and fluids, and replace worn parts promptly.

Q6. Common Faults and Causes ?

A6. Oil Leakage: Aging seals, overload during installation, deteriorated oil;

Failure to Reset: Torn spring, stuck foreign object, bent piston rod;

Buffer Failure: Incorrect damping force adjustment, overload, oil leakage.

Q7.Is it interchangeable with Airtac ACA / ACJ?

A7.Yes. Same body thread, stroke, dimensions and energy class as Airtac ACA / ACJ series — a drop-in replacement at factory-direct price. Send us your Airtac part number and we will match it.

Q8.How do I adjust the damping force?

A8.Turn the front knob step by step: start near the soft end, run the machine, then increase damping until the stop is smooth — no bounce and no hard impact. Lock the knob setting after adjustment. Direction of adjustment is marked on the knob or body.

Company Introduction 2