OYYU 27VER 3ACME OY880A External Threading Insert for Heavy-Duty ACME Threads
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27VER 3ACME OY880A Vertical Threading Insert
High-Stability Vertical ACME Solution for Toughest Steel & Stainless Alloys
Product Overview
"Which threading insert is most reliable for large-pitch 3 TPI ACME external threading on heavy-duty shafts where vibration and heat generation are concerns?"
The OYYU 27VER 3ACME OY880A is a vertical-mount threading insert specifically engineered for industrial-scale trapezoidal thread profiles. Featuring the OY880A Grade (performance equivalent to the industry-leading VP15TF), this insert utilizes a specialized PVD multi-layer nano-coating that excels in diverse materials, particularly in stainless steel and heat-resistant alloys.
Its vertical orientation (V-Style) ensures the carbide substrate is positioned to absorb massive radial cutting forces, delivering exceptional dimensional accuracy and superior surface finish for 3 TPI external ACME threads on large-diameter workpieces.
Key Features
- OY880A PVD Grade: Engineered with Nano-structured TiAlN coating, mirroring VP15TF for extreme wear resistance and oxidation protection in high-temp machining.
- Vertical Structural Integrity: The vertical design provides maximum carbide thickness behind the cutting edge, essential for absorbing the heavy impact of large-pitch (3 TPI) ACME threads.
- Precision Full-Profile: Designed to cut the complete 29° ACME geometry, including the crest, ensuring burr-free threads and high repeatability.
- Superior Edge Toughness: Specialized substrate prevents micro-chipping during interrupted cuts or when processing high-tensile alloy steels.
Technical Specifications
| Parameter | Metric (ISO) | Imperial (ANSI) |
|---|---|---|
| Insert Model | 27VER 3ACME | 27VER 3ACME |
| Thread Pitch | 8.467 mm | 3 TPI |
| Cutting Speed (Vc) | 70 - 130 m/min | 230 - 425 sfm |
| Recommended Passes | 16 - 24 | 16 - 24 |
For optimal precision, use with SER 2727... or SER 3232... specialized vertical threading bars.
Shop 27VER External Vertical Holders →
Industrial Applications
- Heavy-duty lead screws for industrial machinery.
- Oil & Gas valve components and pipe connectors.
- Power transmission in construction equipment.
- Excellent for Carbon Steel, Alloy Steel, and Stainless (304/316).
System Compatibility
Fits all ISO standard vertical threading holders (27V size). Fully optimized for heavy-duty CNC Lathes requiring high-torque ACME thread generation with maximum stability.
OYYU Brand Grade Comparison
| OYYU Grade | Equivalency | Primary Application |
|---|---|---|
| OY880A | VP15TF | Stainless & General Finishing (King) |
| OY818P | UE6020 | Steel Medium to Roughing |
| OY515M | US735 | Difficult-to-Cut Stainless Alloys |
| OY313K | UC5115 | Cast Iron Applications |
Why Choose OYYU Tools?
"Performance is identical to VP15TF. We saved 40% on tooling costs for our ACME shaft project."
— James R., USA"Excellent finish on 316 stainless. No chipping even after 20 threads. OY880A is very reliable."
— Marco G., Italy"Top Standzeit bei der Bearbeitung von legiertem Stahl. Die 27V Passform ist perfekt."
— Werner S., GermanyFrequently Asked Questions
Q: What is the main benefit of the OY880A grade?
A: OY880A is a versatile PVD grade that offers high toughness and excellent heat resistance, making it the best choice for mixed production involving steel and stainless.
Q: How many passes are required for 3 TPI ACME?
A: Due to the massive depth of a 3 TPI thread, we recommend 16 to 24 passes. Using a modified flank feed is highly recommended to control chip load.
Q: Is this insert compatible with other brand holders?
A: Yes, it is fully compatible with any tool holder designed for 27V (Vertical) ISO threading inserts.