Jura by GRS 500-510 QC Complete Set with GRS MicroBlock

The Jura by GRS 500–510 QC Complete Set with GRS MicroBlock is one of the most comprehensive quick-change workholding systems ever offered for precision micro-stonesetting and jewelry holding. Developed under the Jura by GRS line — a collaboration that brought Swiss-influenced workholding refinement to the GRS platform — this set pairs the GRS MicroBlock base with the full range of Jura QC attachments, giving bench jewelers a single, organized solution for gripping rings, cylinders, balls, flat stock, and irregular forms. Production of Jura by GRS tools ended in 2023, and remaining inventory is limited. For professionals seeking a complete setup, this is one of the last opportunities to acquire the full system new.

At the center of the set is the GRS MicroBlock, pre-configured to accept Jura's quick-change jaw interface. The QC system allows rapid swapping between holding configurations without disrupting your workflow — critical when moving between ring shanks, stone tables, and freeform work in a single session. Every component is included and ready to use from first setup through final polish.

Features

• Comprehensive quick-change system for inside and outside holding of rings and small items
• Includes GRS MicroBlock prepared to accept QC jaws and fixtures
• Ten-piece expandable collet set for secure internal gripping
• Dedicated jigs and tops for round, straight, tapered, ball, and cylindrical work
• Shellac/Thermo-Loc fixtures for fast, repeatable fixturing
• M6 interface plate for mounting and stability
• All components organized as a single, ready-to-use set

Specifications

What's Included

• GRS MicroBlock ready for Jura by GRS tools*
• Jura by GRS 500.509 QC Basic Set, which includes:
  • 500-018 Microblock Master Jaw Set
  • 500-010 Inside Ring Holder Jig Set Clamp
  • 500-011 Inside Ring Holder Screw Set
  • 500-504 10-Piece Expandable Collet Set
  • 500-007 Flat Clamp with Groove
• 502-501 M6 Plate with M6 Thread & Screw
• 500-506 Ball Holders (pair)
• 500-507 Tapered Holders (pair)
• 502-015 Shellac/Thermo-Loc Knurled Cylinder
• 502-502 Shellac/Thermo-Loc Triangle Cylinder
• 500-001 Cylinder Top 6 mm with Groove
• 500-002 Cylinder Top 10 mm
• 500-003 Round Top 20 mm
• 500-004 Straight Top 20 mm
• 500-005 Straight Top 40 mm
• 500-014 Shellac Plate
• 500-013 Thermo-Loc Jaw Clamps
• 500-006 Jaw Set with 3/32" Pin Holes
• 500-009 Outside Ring Holding Jaw Set

Notes

Fixtures are designed for use with thermoplastic fixturing materials such as Thermo-Loc, Jett-Set, or traditional shellac. Production of Jura by GRS tools ended in 2023; remaining inventory is limited.

*MicroBlock is QC-ready for Jura by GRS jaws.

California Prop 65 Warning:
Cancer and Reproductive Harm. www.P65warnings.ca.gov.