Vari-Grind Attachment

Description

ToolInfoBox Vari-Grind Attachment
Synonyms:	Vari-Grind Jig Fingernail Grind Jig DE: Wolverine-Schärfhilfe
Type:	jig
Status:	available
Used with:	woodturning tools, Triton TWSS10 bench grinder
Location:	wood workshop (woodturning corner)
Tutors:	Lukas User:Neo
Manual:	https://oneway.ca/pdf/Part%202480%20Vari-Grind%20Dec%202010.pdf

The Vari-Grind Attachment extends the functionality of the Wolverine Jig by enabling repeatable and adjustable sharpening geometries for woodturning gouges. It is especially useful for shaping and maintaining swept-back and fingernail grinds.

By holding the tool at a fixed angle relative to the grinding wheel, the attachment allows consistent bevel angles while still offering flexibility through adjustable settings

Typical Grinding Geometries

Using the Vari-Grind Attachment, the following grinds can be achieved:

• fingernail grind
• bowl gouge grind
• swept-back / side grind
• Irish / Ellsworth-style grinds (depending on setup)

⚠️ As with all grinding jigs, light passes are essential to avoid overheating and uneven bevels.

Setup & Usage Notes

• the attachment mounts into the V-arm of the Wolverine Jig
• projection length of the tool strongly affects the grind geometry - Use 4,5 cm
• small changes in angle or extension can lead to noticeable differences

• always grind evenly across the full width of the bevel

Videos & Further Learning

For a detailed explanation and practical demonstrations, see the following videos:

• Vari-Grind setup and usage (timestamped): https://youtu.be/31pzViUhJuQ?si=7cugImpCzDJui2SA&t=231
• Bowl gouge sharpening with Vari-Grind: https://youtu.be/DmvlvY3mIHs?si=VKHbh_PTnNRaDgax

Notes

• incorrect setup can still result in poor or unsafe tool geometry

• overheating the tool edge will permanently damage the steel