Metric Dimension
Model | M | A | B | C | D | E | F | G | AA | U Allowable Eccentricity | |
---|---|---|---|---|---|---|---|---|---|---|---|
Screw Size | Pitch | ||||||||||
CJ-3x0.5 | M3 | 0.5 | 23 | 5 | 12 | 13 | 7 | 2.4 | 5.5 | 15.6 | 0.5 |
CJ-4x0.7 | M4 | 0.7 | 25.5 | 5 | 12 | 13 | 8.8 | 3.2 | 7 | 18.1 | 0.5 |
CJ-5x0.8 | M5 | 0.8 | 33 | 7 | 14 | 15 | 10.5 | 4 | 8 | 22.4 | 0.5 |
CJ-6x1 | M6 | 1.0 | 36 | 7 | 14 | 15 | 12 | 5 | 10 | 25.5 | 0.5 |
CJS-8x1 | M8 | 1.0 | 38 | 10 | 19 | 20 | 5 | 5 | 12 | 21.5 | 0.5 |
CJS-8x1.25 | M8 | 1.25 | 38 | 10 | 19 | 20 | 5 | 5 | 12 | 21.5 | 0.5 |
CJS-10x1.25 | M10 | 1.25 | 48 | 12 | 24 | 25.5 | 8 | 6 | 14 | 28.5 | 0.75 |
CJS-12x1.25 | M12 | 1.25 | 59.5 | 16 | 30 | 32 | 8 | 7 | 17 | 33.5 | 1.0 |
CJS-14x1.5 | M14 | 1.5 | 63.5 | 16 | 30 | 32 | 11 | 8 | 19 | 37.5 | 1.0 |
CJL-8x1 | M8 | 1.0 | 47 | 10 | 19 | 20 | 14 | 5 | 12 | 30.5 | 0.5 |
CJL-8x1.25 | M8 | 1.25 | 47 | 10 | 19 | 20 | 14 | 5 | 12 | 30.5 | 0.5 |
CJL-10x1.25 | M10 | 1.25 | 57 | 12 | 24 | 25.5 | 17 | 6 | 14 | 37.5 | 0.75 |
CJL-12x1.25 | M12 | 1.25 | 70.5 | 16 | 30 | 32 | 19 | 7 | 17 | 44.5 | 1.0 |
CJL-14x1.5 | M14 | 1.5 | 72.5 | 16 | 30 | 32 | 20 | 8 | 19 | 46.5 | 1.0 |
Q1: How do offset joints differ from standard joints?
A: They compensate both axial eccentricity (0.5–1 mm) and angular error (±5°), maintaining linear load transfer under assembly tolerances and reducing jig accuracy and alignment time.
Q2: How should I choose among CJ, CJS, and CJL for automation?
A: First select by thread size and required thrust/tensile rating, then choose compact (CJS) or reinforced (CJL) based on space and side-load conditions. For long strokes or impact, pick a higher tensile class with a safety margin.
Q3: Can maximum eccentricity and maximum angle be used simultaneously?
A: Treat the limits independently; using both near their maxima reduces practical allowance. Keep margin and validate on the actual machine.
Q4: What should I watch for in high-load or high-cycle duty?
A: Size with adequate safety factor. Where side impacts or vibration exist, use dust boots, lubricate per standard, and periodically check torque and wear.
Q5: Is it suitable for vacuum or cleanroom environments?
A: Yes, provided material compatibility and particle control are verified. Avoid excess lubricant and inspect the boot regularly to limit particle generation.
Q6: What's a good use case on CNC or precision machinery?
A: Mount on clamping/positioning cylinders to accommodate base tolerance and thermal growth, keeping coaxial loading while reducing guide side loads and seal wear.
Q7: Any guidance for semiconductor tooling?
A: On vacuum pickers or alignment actuators, the joint absorbs micro-offsets between carriers and jigs, reducing contact-induced particles; implement routine inspection/cleaning.
Q8: Do these joints require lubrication and periodic maintenance?
A: Apply light anti-corrosion oil per your standard to threads/joint areas. Inspect the boot, locking torque, and abnormal noise/vibration; replace consumables if worn.
Q9: What installation mistakes should be avoided?
A: Exceeding allowed eccentricity/angle, side hard impacts, over/under-tightening, insufficient straight guide length, and operating in dusty environments without protection.
Q10: Can I drop-in replace a ball joint with this type?
A: Often yes, but confirm thread spec, space envelope, allowed misalignment, and load conditions. Pilot-test before volume deployment.