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The Best
Rotary Attachments
for Laser Engraving

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NEW RELEASE

RotoBoss Rotoboss MK-88, Mimaki Kabab upgrade Kit tag icon

Silver Bullet Rotary Chuck Precision, versatility, and a secure grip—all in one rotary. The Silver Bullet is a fully articulating, gear-reduction, belt-driven rotary chuck designed for gantry and galvo laser engraving. Its four-jaw design distributes clamping pressure evenly and symmetrically, providing a secure grip with less tightening force—ideal for delicate pieces and heavier items alike. Key Features Push-button shaft lock: Makes one-handed operation quick and easy. Highly adjustable jaws: Move seamlessly between smaller and larger cups without moving or swapping parts. The jaws offer 1.75 inches of adjustment from fully closed to fully open. Indexed bowl extension bars: Quickly extend the jaws’ reach to accommodate dog bowls and other larger items. Precision unrestricted scissor lift: The best configuration for unparalleled support capabilities, no towers in the way to worry about hitting. Flexible motor options: Works with NEMA 17 or NEMA 23 motors without modifications. Included with Every Configuration Motor Main motor mount Precision unrestricted scissor lift 4 jaws 4 bowl jaw extensions, serving a similar purpose to a chuck bowl plate 4 large rubber jaw posts 4 thumbscrews for the bowl jaw extensions First ever Laser 4 Jaw chuck that gives you more pressure with less force by disbursing the pressure evenly and symmetrically. Ideal for more delicate and heavier items. Most adjustable: The most adjustable jaws on the market that allow for seamless transition between smaller and larger cups without having to move or change any parts like other rotaries. These jaws have a total of 1.75in adjustability from fully closed to fully open. Universal adaptability: Adaptable to the Rotoboss, Junior, Ascend and Galvo rotaries. Diverse Engraving Potential: Can be used with NEMA 17 or 23 Motors with no mods required. Lifetime Warrant and Support

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Customer Reviews

We Know you are going to love our rotaries, but don't take our word for it. See what just a few of our customers say about their RotoBoss rotary attachments.

TJ. Flot Verified Buyer

May 7, 2025

Always There!

Now when it comes to rotaries there are a lot out there and some leave a lot to be desired. I personally have had my fair share. About two years...

Amber P. Verified Buyer

May 16, 2023

Above and beyond!

I've always loved my rotoboss but never had to do anything with the customer service side of things...until I couldn't figure out how to engrave dog bowls and yall told...

Chelsea B. Verified Buyer

May 12, 2023

Excellent

Excellent Design. Fast shipping

Richard W. Verified Buyer

May 7, 2023

Perfect addition

I was having very slight walking with my tumblers. Not anymore!!! This attachment makes all the difference.

Randdall Reyna Verified Buyer

January 7, 2025

Easy Setup

I watched every video you guys had while waiting on this to show up. Made it easy to know exactly what to do when setting it up! As someone that...

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Frequently Asked Questions

Have questions? Below are some of the most common questions and answers for our customers. If you have any other questions, feel free to contact us today!

  • You will need to install the supplied Mug spacer (Triangular piece) that bolts to the face of the Clamp bracket.
  • You may also need to install the heel plate spacer (slotted rectangular piece) that slides down over the heel plate to offset the gap.

When doing water bottles you will need to adjust your steps down, a good starting point is to lower your step by about 1,000 steps and adjust from there. Once you have the settings set, save that file from machine settings so you can quickly revert to that when you do that object again.

  1. Use the large clamp wheel provided in your bag with the stickers.
  2. Make sure the rim (not the screws) is set on the drive wheels.

  • Heel Plate not close enough to the bottom of the cup (don’t let it touch).
  • O-Rings twisted.
  • You can slightly raise the slave wheels up a little past level.

Mechanically they are the same. The major difference is that the Rotoboss has two towers and allows for more adjustability for many more objects and the Junior only has one tower and is made for mainly Cup, Mugs, Tumblers and water bottles.

  • 2 Phase has 4 wires coming out of the motor.
  • 3 Phase has 6 wires coming out of the motor.

Watch Our Rotaries in Action

Checkout our video of our RotoBoss Ascend rotary laser engrave on a wooden baseball bat. Order yours today!

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RotoBossTM 2.0

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RotoBossTM Junior

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RotoBossTM Ascend

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About Us

Jason Rife - The Man Behind RotoBossTM

In the heart of Ohio, young Jason dreamt of jet engines and wooden carvings. The US Navy saw him for 20 years, training rookies and perfecting jet mechanics. But his garage? It whispered tales of crafts, designs, and innovations. Nearing his Navy retirement in Italy, Jason's heart pulsed with ambition - why rely on others when he could craft magic himself...

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