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
| System Type |
Quick-Change (QC) workholding set |
| Workholding Base |
GRS MicroBlock (QC-ready) |
| QC Attachments Included |
13 different QC attachments |
| Set Components |
QC Basic Set plus full attachment collection |
| Brand |
Jura by GRS |
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.
