20T2.5-255+2 Black PU timing belts for Wire Cutting Machines
20T2.5-255+2 Black PU timing belt is a specialized precision component used in the wire-feed and tensioning systems of high-end Wire EDM (Electrical Discharge Machining) machines. The black PU version is often preferred for its improved UV resistance and visibility contrast in bright machine environments. Technical Specifications Parameter Detailed Specification Tooth Profile T2.5 (Metric T-shape, 2.5mm…
20T2.5-255+2 Black PU timing belt is a specialized precision component used in the wire-feed and tensioning systems of high-end Wire EDM (Electrical Discharge Machining) machines.
The black PU version is often preferred for its improved UV resistance and visibility contrast in bright machine environments.
Technical Specifications
| Parameter | Detailed Specification |
| Tooth Profile | T2.5 (Metric T-shape, 2.5mm Pitch) |
| Number of Teeth | 102 Teeth (Total length 255mm / Pitch 2.5mm) |
| Belt Width | 20mm |
| Coating Thickness | +2mm Black PU Overlay (Smooth or textured) |
| Material | CPU+Polyurethane (PU) |
| Internal Reinforcement | High-tensile Steel Cords (Standard for EDM precision) |
| Color | CPU transparent bucket belt with black Pu coating |
Precision 20T2.5-255+2 Black PU Timing Belt for Wire EDM
Designed for the demanding accuracy of Wire Cutting Machines, the Yonghang® 20T2.5-255+2 belt ensures stable, synchronized movement for wire transport and positioning. The T2.5 metric pitch provides high-resolution engagement with pulleys, while the integrated steel cord reinforcement guarantees zero-stretch performance, which is vital for maintaining the micron-level tolerances required in EDM processing.
The +2mm black polyurethane coating provides a soft yet high-friction surface. This extra layer acts as a buffer to absorb micro-vibrations during high-speed wire travel and provides a non-slip grip that protects the wire-guide mechanism from mechanical wear.
Key Advantages:
- Enhanced Friction & Grip: The 2mm black coating ensures consistent wire feeding without slippage, even in the presence of dielectric fluids.
- Chemical & Oil Resistance: Fully resistant to the oils and synthetic fluids used in wire cutting processes, preventing belt swelling or degradation.
- Synchronized Precision: CNC-manufactured T2.5 profiles ensure perfect timing, eliminating “pitch accumulation” errors that can lead to machining defects.
- Durability: The black PU formula is optimized for high-frequency back-bending, ensuring a long service life under continuous industrial operation
Application
- Wire EDM Machines – Core Applications
- Automated Wire Stripping and Crimping Equipment
- Precision Rotational Coating and Optical Scanning Equipment
- Compact Medical and Biochemical Analyzers (Medical & Lab Automation)
FAQ
Q:Why choose a belt width of 20 mM?
A:20 mm width: T2.5 pitch belts are typically narrow, but they are widened to 20 mm to distribute pressure. When the belt presses against wires or precision components, the wider contact surface prevents damage caused by excessive localized pressure.
Q:Why choose a “black” coating instead of a white one?
A:Black (Black PU): Compared to transparent or white PU, black material typically offers better UV resistance and stain resistance. In industrial environments with heavy oil contamination, black belts appear neater, and certain formulations of black belts offer higher abrasion resistance.
