SP-15 X-RING INGCO (RH150028) E-50
🧰 What It Is
An X‑ring is a rubber sealing ring with a distinctive “X” cross‑section profile. Unlike a simple O‑ring (which has a round cross‑section), the X‑ring has four sealing surfaces, which gives it better sealing reliability and lower friction in dynamic (moving) applications.
The SP‑15 X‑Ring is sized and shaped to fit a specific groove inside the internal mechanism of the RH150028 rotary hammer — typically where two parts must slide or move while remaining sealed against air, dust, or lubricant leakage.
⚙️ Technical Function
This X‑Ring typically performs the following functions inside the tool:
1. Sealing Air or Pressure
Helps seal pneumatic chambers or passages so air pressure can build and release correctly during hammering.
Improves hammer impact efficiency by reducing pressure loss.
2. Lubrication Retention
Prevents grease or oil from escaping key gear or piston areas, keeping moving parts lubricated and protected.
3. Dust and Debris Exclusion
Blocks abrasive particles (e.g., fine concrete or masonry dust) from entering internal mechanisms where they can cause wear.
4. Low‑Friction Dynamic Seal
The X‑profile reduces rolling/sliding friction compared to round seals, improving the durability of moving parts.
5. Vibration Damping
Helps absorb shock and vibration in areas with relative motion between metal parts.
🛠️ Where It Fits
In the RH150028 parts diagram, E‑50 shows the exact location where this ring sits.
It is commonly used around sliding shafts, pistons, sleeves, or cylindrical mating surfaces.
The ring fits in a precisely machined groove so it is compressed to form a tight seal as parts move relative to each other.
Because rotary hammers operate under impact, vibration, and dust exposure, a good seal like an X‑ring is essential for long‑term reliability.