The Dove-tail Spacer Milling Machine is a high-precision solution designed for processing transformer insulation spacers, especially oil gap spacers used in high-voltage windings. This dovetail spacer milling machine for transformer applications replaces traditional punching methods by using profile milling technology to complete shaping, slotting, and chamfering in a single process.
As an advanced insulation spacer milling machine, it ensures burr-free surfaces, eliminates secondary polishing, and delivers products capable of passing high-voltage testing, making it ideal for transformers above 110kV.
This dovetail spacer milling machine is mainly used for machining various types of oil gap spacers, including dovetail slots, swallow-tail slots, and straight grooves. It plays a critical role in transformer cooling duct spacer manufacturing, ensuring precise alignment and high structural integrity.
Profile milling cutters complete shaping, slotting, and chamfering in a single cycle, significantly improving efficiency in insulation spacer machining processes.
Spacer length and slot depth accuracy reach ±0.2 mm, ensuring reliable performance in high-voltage transformer insulation systems.
The milling process produces smooth, flat surfaces without burrs or carbonization, eliminating the need for additional polishing.
Specially designed for spacers used in transformers above 110kV, ensuring strong mechanical and insulation performance.
Main steel components undergo aging treatment, while transmission parts are heat-treated to ensure durability and long-term stability.
With machining speeds up to 260 pcs/min, the machine supports mass production in transformer insulation spacer production lines.
Processing Range
Machining Accuracy
Length Accuracy: ±0.2 mm
Slot Depth Accuracy: ±0.2 mm
Groove Center Deviation: ≤ ±0.2 mm
🔹 Machine Performance
Max. Machining Speed: 260 pcs/min
Feeding Speed: 1–3 m/min
Max. Clamping Thickness: 340 mm
🔹 System Parameters
Total Power: 18.4–29.3 kW
Air Pressure: 0.5–0.6 MPa
Air Flow: 100 L/min
🔹 Machining Quality
Smooth surface, burr-free
No carbonization or contamination
High consistency for batch production
A dovetail spacer milling machine is used to process transformer insulation spacers into precise shapes, including dovetail and slot structures.
Milling produces burr-free surfaces, higher precision, and eliminates secondary processing, improving quality and efficiency.
This insulation spacer milling machine achieves up to ±0.2 mm accuracy in both length and slot depth.
The machine is suitable for laminated wood and insulation materials used in transformer manufacturing.
Yes, it is specifically designed for transformers above 110kV, where precision and insulation performance are critical.
Yes, with speeds up to 260 pcs/min, it is ideal for large-scale industrial production.
