17M-15-49270 17M1549270 RING SEAL Engineering Machinery Parts D155A-5 D275A-5R

1. Quick Details of  seal 17M-15-49270:

2. 17M-15-49270 parts on group :

3. 17M-15-49270  picture:

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5. FAQ
Q: why the copper ring is Buckle opening ?

A: This  ring you are looking at is a hook-joint seal ring (often referred to in parts manuals as a metal sealing ring). In heavy equipment transmissions, these serve as dynamic oil-delivery seals on rotating shafts—and that interlocking "buckle" opening is a clever bit of engineering designed to solve 3 major mechanical challenges.

• 1. It Allows Assembly Without Stretching the Metal,Unlike an elastic rubber O-ring, a solid copper, brass, or cast-iron ring cannot stretch.To install it, you have to slide it over the transmission shaft and drop it into a deep, machined groove.The buckle opening allows you to carefully unhook the joint, expand the ring just enough to pass over the diameter of the shaft, and snap it securely into the groove without permanently bending, warping, or snapping the metal.
• 2. It Acts Like a "Piston Ring" to Block High-Pressure Oil.These rings act as a rotary union, sealing the high-pressure oil moving from the stationary transmission housing into the oil passages inside the spinning shaft to engage the clutch packs.Once inside the bore, the ring expands outward against the wall of the housing.A simple diagonal cut or straight gap would allow a massive amount of pressurized oil to bleed right through the opening.The interlocking buckle design forces the two ends to overlap mechanically. This creates a labyrinth path that effectively traps and blocks the oil, minimizing pressure drops so your clutches switch gears quickly and firmly.
• 3. It Compensates for Heat Expansion:Transmissions get incredibly hot under load. When the copper/metal heats up, it expands in circumference.

Q: How long does a bronze piston seal ring typically last?

A: Under normal operating conditions with clean fluid and proper alignment, a high-quality bronze ring can last 5,000–10,000 operating hours, depending on load and cycle rate.

6. Exhibition and Wearhous

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