ACA ACJ series Shock Absorber

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

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.