Finding Your Perfect Welder

Sisma's new LM-D Series offers more power levels and configurations than ever, giving you the freedom to choose the ideal balance of power, format, and vision system for your workflow.

  • Four power options — 190, 230, 260, and 300 joules
  • 24 model variations to match your needs
  • More than 20 available accessories for full customization
Power Levels & Performance
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Joules

190J, 230J, 260J, 300J

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Smart Spot Technology

Keeps laser energy stable for consistent welds

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Weld Spot Diameter

0.2mm - 2.0mm, or down to 0.05mm with Nanospot

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Pulse Duration

Range of 0.5 - 25ms

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Max Power

Output from 7.5kW - 11.2kW

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Average Power

From 65W - 110W

Design & Chamber Access
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Desktop Lasers

Available in LM-D Ready & LM-D versions

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Freestanding LM models

Includes a wheeled, height-adjustable base

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More Interior Space

Wide openings and bright, adjustable lighting

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Closed Option

Has arm holes and a front door

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Flex Access

Wide chamber opening with leather flaps

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Fully Open Chamber

Available for maximum welding space

Optics & Camera Systems
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Microscope & Display

OEM 10X Stereo Microscope and 7" Touchscreen included on LM-D Ready models

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Optics & Screen Upgrade

Leica 10X Stereo Microscope and 10" Touchscreen come standard on all models except LM-D Ready

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Lynx Dynascope Option

Available for an ergonomic, fatigue-reducing 3D view

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Integrated Camera

LM-DT & LM-T versions show welding live on screen in real time. You can also weld via screen interface

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Connectivity

T-Versions can connect to external monitor or television through HDMI port

Precision Laser Technology
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Next-Generation Resonator

One-piece aluminum housing ensures stable mirror alignment and performance

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Pulse Shaping

Improves weld strength and reduces porosity

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Advanced Cooling System

Keeps performance stable during heavy use

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Nanospot Microwelding

Enables ultra-fine work down to 0.05mm (Optional feature)

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Power Boost

(LM 300) Adds energy for tough materials

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Velvet Spot Technology

(Coming Soon - LM 300) Improves weld finish and penetration

Why Jewelers Choose Sisma
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Who is Sisma?

Renowned Manufacturer of Precision Machinery for Jewelry since 1961

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Global Presence

Proven reliability with thousands of systems used worldwide

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Innovation

Patented technologies that deliver cleaner, stronger, and more consistent welds

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Clarity

Industry-leading optics and camera systems for exceptional definition

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Energy Efficient

Low operating costs with long-lasting components and efficient cooling system

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Support

Local service, training, and support provided by Gesswein

Customize Your Welder
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Microscope Ergokit (shown here), Headrest, and Extra Magnification

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Adjustable Varibench Stand

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Leica Ergo Wedge

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Foot Pedals (Laser + Air)

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Padded Armrests + Side Trays

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Welding Chairs

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Speedwire Precious Metal Wire

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Transformer + Argon Regulators
Shop Jewelry Laser WeldersSee Welder Comparison Chart

Learn More About Laser Welding

Explore videos, FAQs, and resources to learn more about Sisma’s precision laser technology below. When you’re ready, our team is here to guide you through the options, answer your questions, and help you find the right Sisma welder for your business.

  • Why Modern Jewelers Need a Laser Welder

    How can a laser welder help your jewelry business? Dive into the benefits and details of how this machine can increase your revenue, boost your efficiency, and expand your capabilities.

    Read More

  • Sisma: The Brand Behind Better Welds

    Built in Italy and backed by Gesswein’s expert support, discover how Sisma welders deliver incredible results across repair, fabrication, and custom design processes.

    Read more

  • Meet the Next Generation of Sisma Laser Welders

    Explore what’s improved and learn about advancements behind Sisma’s new laser welders, designed for greater comfort, control, and consistency.

    Read More
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Frequently Asked Questions

What is laser welding?

Laser welding uses a concentrated beam of light to fuse metal alloys with precise, adjustable control—creating clean, accurate welds even in hard-to-reach areas or near heat-sensitive stones.

What metals can a Sisma laser welder be used with?

A laser welder can be used on all precious metals and to join different metals (e.g., gold to platinum, silver to gold), including:

  • Karat gold
  • Sterling silver
  • Platinum
  • Palladium
  • Titanium
  • Niobium
  • Stainless steel
  • Base metals

What tasks can I do with a laser welder?

A laser welder an essential tool for any jeweler who wants to increase accuracy, output, efficiency, and profitability. It can even expand your in house capabilities and create new revenue streams!

Popular laser welding applications for jewelers include:

  • Fix casting defects, pits, and porosity.
  • Chain and Clasp Repair
  • Channel Rebuilds
  • Prong Rebuilding and Retipping
  • Pave Rebeading
  • Ring Sizing
  • Earring Post Repair
  • Laser Polishing
  • Tacking for fabrication
  • Repair watches, eyeglass frames, and other delicate pieces.
  • And so much more!

Can I weld near or on top of gemstones?

Yes, you can! Laser welding is ideal for delicate, stone-set jewelry and stones can stay safely in place during repair thanks to a small, targeted spot weld.

How can laser welding help my business?

  • Perform repairs in-house instead of outsourcing
  • Expand repair services (eyeglasses, watches)
  • Reduce prep, soldering, and cleanup time
  • Provide customers with faster turnaround
  • Increase custom design potential

Service and Support You Can Count On

At Gesswein, we provide more than just access to cutting-edge technology — we offer the expertise and support network behind it. Our U.S.-based team is here to help you every step of the way, from installation and training to ongoing maintenance and troubleshooting. With certified technicians, stocked parts, and remote diagnostics, we’re committed to keeping your Sisma laser performing at its best.

  • Trained Laser Professionals

    Our team of account managers and service technicians are fully trained on our laser systems so we can give you expert guidance and the best quality service.

  • Laser Install + Training

    We provide resources to help set-up, operate, and maintain your laser so you can keep your machine running smooth for years to come.

  • Preventative Maintenance

    We help you stay productive with routine service reminders and fast access to replacement parts when needed. Our stocked inventory means minimal downtime and quick turnaround.

  • Remote & Onsite Support

    Whether you have performance questions or need help troubleshooting, our team provides remote diagnostics and onsite service to get your machine back to peak performance quickly.

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  • Financing Made Simple

    Make the upgrade with confidence. Simple financing, flexible terms, and expert support every step of the way. Contact Us using the form below for more info.

  • See What a Sisma Can Do

    Take a closer look at real-time laser welding and discover Sisma Laser Welders capabilities.

    Watch Now