Tooltos Spot Welding Tungsten Needle Grinder | USB, 13000-25000 RPM

Key Selling Points

• Restores blunt, oxidized, or contaminated tungsten pins to a sharp, clean tip — extends the service life of your spot welder electrodes and maintains consistent weld quality
• USB powered (3V-9V) — connects to any USB port, power bank, or USB adapter without requiring a dedicated power supply
• 13000-25000 RPM grinding speed provides fast, controlled material removal for reshaping worn tungsten tips
• Compact and lightweight — keeps on the bench next to the spot welder for immediate use whenever a pin needs resharpening
• Designed specifically for spot welder tungsten pins — the grinding geometry produces the correct tip profile for consistent point contact during welding

About This Grinder

Tungsten pins are the consumable element of a spot welder. Each weld cycle applies heat and pressure to the pin tip, which gradually flattens, oxidizes, and accumulates contamination from the workpiece. A degraded tip produces inconsistent contact area, uneven current distribution, and weaker welds — the same settings that produced clean welds with a fresh pin will produce poor results with a worn one.

The Tooltos Tungsten Needle Grinder resharpens worn pins back to a consistent tip geometry without replacing the electrode. USB powered and compact, it sits next to the spot welder on the bench and takes seconds to use between welding sessions. Regular resharpening extends the usable life of each tungsten pin and keeps weld quality consistent across the full service life of the electrode.

Best For / Not For

Technical Specifications

Pro Tips

• Resharpen the tungsten pin at the first sign of weld quality degradation — catching a worn tip early requires less material removal and produces a more consistent tip geometry than waiting until the tip is severely flattened.
• Use a consistent grinding angle each time — maintaining the same tip angle across resharpening sessions keeps the contact geometry predictable and reduces the need to re-tune your spot welder settings.
• Clean the tungsten pin with a fine abrasive or wire brush before grinding to remove surface oxidation — grinding through heavy oxidation takes longer and produces more debris.
• Higher USB voltage (closer to 9V) provides faster grinding speed for more aggressive material removal. Lower voltage gives finer control for finishing the tip geometry.

Frequently Asked Questions

What USB voltage should I use?
The grinder operates between 3V and 9V via USB. A standard 5V USB port (phone charger, computer USB port, or power bank) works well for most resharpening tasks. Higher voltage (up to 9V via a USB-C PD adapter) provides faster grinding speed for more aggressive material removal.

Is this compatible with all spot welder tungsten pins?
This grinder is designed for standard spot welder tungsten pins and electrodes. Verify that your pin diameter fits the grinder before use. It is not designed for general-purpose grinding of other materials.

How often should I resharpen the tungsten pin?
Resharpen whenever you notice weld quality declining — inconsistent weld strength, increased spatter, or visible flattening or discoloration of the pin tip are all signs that resharpening is needed. In high-volume use, this may be after every few hundred welds.

What if I have questions after receiving the grinder?
Contact the Tooltos team at sales@tooltos.com. We respond within 24 hours on business days.

What's Included

• 1 x Tungsten needle grinder
• 1 x USB cable

Support

Questions about compatibility or order status? Contact the Tooltos team at sales@tooltos.com. We respond within 24 hours on business days.