M8 15mm Length - Stainless Steel Miniature Spinning Ball Plunger Japan

M8 x 15mm Stainless Steel Miniature Spinning Ball Plunger
✔️ Super Heavy Load - Corrosion & Heat Resistant - Made in Japan

This high-performance M8 miniature ball plunger is built for serious jobs. With a 15mm body length and all-stainless steel construction, it’s designed for ultra-heavy-duty use. The rotating SUS440C ball reduces wear and tear on contact surfaces, while the internal spring provides strong, consistent force.

✅ Thread Size: M8 (Coarse)
✅ Thread Pitch: 1.25
✅ Body Length (L): 15mm
✅ Ball Diameter (D): 4mm
✅ Ball Height (B): 4mm
✅ Stroke (s): 1mm
✅ Load Range: 13N (min) - 39N (max)
✅ Weight: 3.5g
✅ Load Type: Super Heavy Load
✅ Color-Coded Hex Socket: Blue for easy ID

Material Details
✅ Body: Equivalent to SUS304 stainless (excellent corrosion resistance)
✅ Ball: SUS440C hardened stainless (HRC 55-60)
✅ Spacer: SUS304 stainless
✅ Spring: SUS631J1 (high strength & fatigue resistant)

💡 Why use a spinning ball plunger over a fixed one?
A spinning ball reduces friction and wear on both the plunger and the contact surface. It’s ideal for:

1. Sliding or indexing components

2. Applications that need smooth actuation under heavy loads

3. Extended wear life in precision setups

Compact, rugged, and made in Japan - this little beast delivers big holding power. Want smooth positioning and serious spring strength? Add this to your setup!