Stone Ring Expanding Machine with Lever

The Stone Ring Expanding Machine with Lever is a powerful precision tool designed for goldsmiths, jewelers, and professional workshops that need to enlarge rings reliably, accurately, and with minimal material stress. It is ideal for wedding rings, signet rings, and stone rings, covering a diameter range from Ø 12.4 mm to 22.4 mm.

Thanks to its robust construction, fine mechanical guidance, and wide selection of profile rollers, the machine enables uniform, low-stress expansion, even for rings with irregular cross-sections.

Features:
• Precise expansion of stone rings, signet rings, and wedding rings
• Wide working range: Ø 12.4 - 22.4 mm
• Gentle material handling thanks to finely guided rollers
• Ideal for irregular cross-sections
• Easy and safe operation through lever mechanism and stable guidance

How it Works
The ring is placed onto one of the three conical mandrels. A suitable profile roller or the smooth roller is then mounted onto the lever punch.
By applying lever pressure while rotating the punch, the ring is expanded in a controlled and uniform manner, ideal for precise adjustments and series production.

Scope of delivery:
Stone Ring Expanding Machine with Lever
8 profile rollers (13 different profiles)
1 smooth roller
3 conical mandrels

Technical data:
Working range: Ø 12.4 - 22.4 mm
Profile rollers: 8 rollers with 13 profiles
Weight: 8 kg

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