Winway supplies the PCD PCB Corner Radius Cutter for PCB corner-rounding machines. It adopts an alloy-steel substrate with a brazed polycrystalline-diamond cutting layer. The cutting edge is precisely ground to a fixed-R profile and undergoes dynamic-balance correction for low-vibration, high-speed rotation. It is designed for rounding FR4 copper-clad laminates, multilayer boards, aluminum-base boards and heavy-copper boards. Compared with ordinary tungsten-steel cutters, it offers longer service life and produces smooth, burr-free rounded corners while helping prevent edge chipping and copper-foil lifting. Multiple regrinding cycles are supported, and custom R-radius, angle and outer dimensions are available.
The PCD PCB Corner Radius Cutter is a special-purpose cutter designed for PCB corner-rounding machines. Its pre-brazed polycrystalline diamond cutting profile features a fixed R-radius that mills sharp right-angle PCB edges into smooth rounded corners. This helps protect copper foil, operators and dry film or cover film used in subsequent processes from scratches caused by sharp board corners. Custom R-radius and chamfer angles are available.
● Precision R-Corner Profile: The PCD cutting edge is precisely ground to a fixed-R profile for consistent rounded-corner processing.
● Longer Service Life: The PCD cutting layer offers a service life stated as 10–22 times that of ordinary tungsten-steel rounding saws.
● Smooth Edge Finish: The mirror-polished tooth profile helps produce smooth rounded corners without visible burrs or scratch marks on copper and gold-plated layers.
● Low-Vibration Operation: Dynamic-balance correction supports low-vibration and low-noise operation during high-speed rotation.
● Multiple Regrinding Cycles: The cutter supports repeated regrinding to extend its usable service life.
● Custom R Specifications: Custom R-radius, angle and outer dimensions are available to meet different PCB corner-rounding requirements.
Driven by the machine spindle at high speed, the pre-formed PCD rounded-profile cutting edge uses combined milling and grinding to transform sharp right-angle PCB edges into smooth, standardized R-corners.
● Profile Cutting: The profiled PCD cutting edge forms the required R-geometry in one pass without secondary polishing, helping maintain consistent corner dimensions across PCB panels.
● Material Removal: Diamond grains process exposed glass fibers, resin and copper foil under low cutting stress, helping reduce the risk of edge chipping, delamination and copper-foil lifting.
● Chip Evacuation: Chip evacuation gaps help remove glass-fiber dust and cutting residues, reducing the accumulation of debris around the board edge.
● One-Pass Processing: The pre-formed profile completes corner rounding in one pass, producing uniform R-corners for subsequent PCB procedures.
Matching Equipment: Special-purpose PCB corner-rounding machines.
| Ordinal | Outer Diameter (mm) | Thickness B (mm) | Teeth Number Z | R-Radius (mm) | Inner Diameter (mm) |
| 01 | 105 / 108 | 16 | 6 | 6, 8, 10 | 25.4 |
| 02 | 100 | 16 | 6 | 6, 8, 10 | 25.4, 30 |
Parameter Note: Custom small-R radii are available for miniature PCBs, while larger R-radius options can be specified for thick, large-format circuit boards.
● Avoid violent impact or collision when mounting or removing the cutter.
● Clean copper and resin residues from between the teeth after every production shift.
● Do not process PCB panels containing sharp hard-metal burrs or foreign impurities.
| Incorrect Operation | Possible Result | Correct Method |
| Excessive spindle speed | Tooth chipping | Operate within the recommended spindle RPM range. |
| Skipping regular tooth cleaning | Copper accumulation and uneven R-corner dimensions | Clean chip residues after every production shift. |
| Processing PCB panels containing metallic impurities | Severe PCD-tooth damage | Sort and inspect raw PCB panels before the rounding process. |
Each PCD PCB Corner Radius Cutter is individually packed in an anti-rust plastic tube. This packaging keeps each cutter separately protected during packing and transportation.
For bulk orders, the cutters are packed in cartons filled with shock-absorbing foam to provide cushioning during transit. Each product carries a label showing its full specification details, making it easier to identify the corresponding product model and specifications.
We provide several transportation options, including DHL, sea freight, and land transport. The shipping method can be selected according to the order requirements and destination.
A: Yes. Standard options include R6, R8, and R10, and custom ultra-small R3 profiles can be produced according to processing requirements.
A: Yes. The PCD cutting teeth support multiple regrinding cycles, helping extend the cutter's service life.
A: Yes. Sample trial orders are supported so that customers can evaluate the cutter's compatibility with their PCB corner-rounding equipment.
A: Please provide the required outer diameter, inner diameter, thickness, R-radius, and tooth specifications. Machine model and processing requirements can also help confirm the suitable cutter configuration.
A: Yes. We support customized R-radius, angle, and outer dimensions. Please share your required specifications or technical drawing so we can evaluate your quotation request.
A: Please confirm the required R-radius, outer diameter, inner diameter, thickness, tooth configuration, and order quantity. Providing these details helps ensure that the selected cutter matches your processing requirements.
Address
Building 17, Yonglida Tiansheng Industrial Park, No. 50 Gangkou Avenue, Wanjiang District, Dongguan City, Guangdong Province, China
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