Product Description
The CMT 541.350.00 1/4" Seeger Security Ring is a precision-machined retaining clip designed to secure 1/4" router bit and drill shanks during operation. Conforming to UNI 7434 standards, this Seeger-style snap ring gives woodworkers and machinists reliable depth control and bit retention - whether running a router, drill press, or CNC routing machine. By locking onto the shank at a fixed position, the ring establishes a consistent, repeatable depth of cut and prevents the bit from migrating through the collet or chuck under cutting load.
Key Features
- UNI 7434 Seeger security ring standard - engineered to a recognized international retaining ring specification, so fit and function are consistent and predictable on compatible tooling.
- Designed for 1/4" shanks - seats precisely on 1/4" router bits and drill shanks, eliminating slop or misalignment that could compromise cut accuracy.
- 3/32" ring diameter - a compact profile that indexes into the shank groove without adding bulk, allowing the bit to seat fully in the collet.
- Depth-of-cut control - setting the ring before a routing or drilling pass lets you repeat the exact same cut depth across multiple workpieces without re-measuring each time.
- Prevents bit pullout under load - acts as a positive mechanical stop that keeps the shank from being drawn through the chuck or collet during heavy cuts, protecting both the tool and the workpiece.
Why This Product
- Repeatable results on production runs - once set to the desired depth, the Seeger ring acts as a mechanical memory for your bit position, reducing setup time on repeat cuts across multiple pieces.
- Safety-focused design for routing and drilling - bit pullout under load is a real operational hazard; this retaining ring provides a physical barrier that keeps the shank locked in place during demanding cuts.
- Compatible with three major machine types - fits routers, drill presses, and CNC routing machines, making it a versatile shop accessory rather than a single-use solution.
- Standardized to UNI 7434 - the defined specification means the ring is engineered for the groove geometry of compatible 1/4" tooling rather than being a generic fit-all clip.
Specifications
- Manufacturer Part Number: 541.350.00
- Brand: CMT Orange Tools
- Product Type: Seeger Security Ring
- Compatible Shank Size: 1/4"
- Diameter: 3/32"
- Standard: UNI 7434
- Series: 541 - Seeger Security Rings
Approved Applications
- Router
- Drill Press
- CNC Routing Machine
Frequently Asked Questions
What shank size does this Seeger ring fit?
This ring is designed specifically for 1/4" shanks. It is not intended for use on larger shank sizes such as 1/2" or other diameters.
What is the ring diameter of the CMT 541.350.00?
The ring has a diameter of 3/32", which corresponds to the groove geometry of compatible 1/4" router bit and drill shanks per the UNI 7434 standard.
What machines can this Seeger security ring be used with?
The 541.350.00 is compatible with routers, drill presses, and CNC routing machines - any machine that accepts a 1/4" shank bit through a collet or chuck.
What is the purpose of a Seeger security ring on a router bit or drill shank?
A Seeger security ring serves two functions: it sets a repeatable depth of cut by acting as a stop against the collet or chuck face, and it prevents the bit shank from being pulled through the collet under the forces generated during cutting or drilling operations.
Reviews
FAQs
Standard Shipping is free on most orders over $50 within the contiguous US. If the order is under $50.00, the shipping is $9.99 set fee for shipping within the contiguous US.
Most of our products will ship within 1 to 3 Business Days. Some Special order products will ship within 2 to 5 Business Days. Preorders will be shipped to you on a first come first serve basis as soon as available from the manufacturer. Items that are "Made-to-Order" (Custom order products) will be shipped when fabrication is completed, shipping and delivery times will vary and depend on manufacturing.
Products that are shipped directly from the manufacturer will have processing and fulfilment times subject to manufacturer availability.
Preorders are shipped on a first come first serve basis as soon as available from the manufacturer, the sooner you place your Preorder the sooner your order will ship.
Freight shipping Policy:
Orders/Items too large or heavy may require special handling/Shipping and may require to be sent by truck. Someone must be present to accept truck deliveries. Standard truck delivery is to a dock facility designed to receive freight. You will be notified within 24 hours of ordering to confirm delivery. Lift gates for deliveries are available for an additional fee.
We offer Financing options through Clicklease
Please email your Return request to info@FactoryDirectSupplyOnline.com
Include the order number and the reason for your return.
All returns, regardless of their categorization, must include all original parts, be in their original packaging, and in the condition in which they were received. You may not qualify to receive a refund If the returned item is used, damaged, missing any parts, or is damaged during return shipping.
Checkout our complete Return policy
You can contact us through our contact page! We will be happy to assist you.