LBTEK-Your Trusted Partner For Optoelectronic Experiments!

Product Description

Surface slot suitable for circlip wrench
Can be purchased in packs of 10
SM05, SM1, SM1.5, SM2, SM30 optional

LBTEK Retaining Rings are made from 6061-T6 aluminum alloy or 304 stainless steel, with a black anodized surface finish. The symmetrical slots are compatible with spanner wrenches. They are used in mechanical components with SM thread specifications to secure optical elements using retaining rings of the same specification. Currently, LBTEK offers five models of retaining rings: SM05, SM1, SM1.5, SM2, and SM30. They can meet customer needs for installing and securing optical elements with diameters of Ø12.7 mm, Ø25.4 mm, Ø38.1 mm, Ø50.8 mm, and Ø30 mm. They are available for purchase in packs of 10. LBTEK provides custom services for retaining rings with special surface treatments, dimensions, and thread specifications. If you have any requirements, please contact technical support.

Attribute

Material6061-T6 aluminum alloy or 304 stainless steel

Surface treatmentBlack anodized

Optional modelsSM05，SM1，SM1.5，SM2, SM30

Stress-Free Retaining Ring

Reduces installation stress on the clamped component
Compatible with optical mounts and lens tubes
Effectively prevents light leakage from the sides of optical elements
Five models available: SM05, SM1, SM1.5, SM2, SM3

LBTEK stress-free retaining rings offer multiple thread specifications, covering standard SM05, SM1, SM1.5, SM2, and SM3 models to accommodate different optical component installation needs. The product features a nitrile rubber O-ring design. Compared to standard retaining rings, stress-free retaining rings require less force to secure optical components. This method effectively reduces stress damage on the optical component surface while achieving reliable optical sealing around the component, balancing protection and fixation stability.

The retaining rings retain a dual-groove structure and are directly compatible with LBTEK's spanner wrenches, enabling convenient and efficient installation and removal. It should be noted that due to the built-in rubber O-ring, the clear aperture is slightly smaller than that of standard retaining rings. Actual selection can refer to the corresponding specifications. Additionally, since the O-ring is elastic and installed via compression, the actual thickness may vary by ±0.1 mm from the labeled thickness.

The stress-free retaining ring is installed on the fixed mounting bracket.

Product Model	Clear Aperture	Material	Thickness	Unit Price	Lead Time
SM1RSF New	Ø20.7 mm	6061-T6 aluminum alloy	3.9 mm	$15.82	today
SM05RSF New	Ø8.1 mm	6061-T6 aluminum alloy	3.9 mm	$13.34	today
SM3RSF New	Ø64 mm	6061-T6 aluminum alloy	4.1 mm	$18.17	today
SM2RSF New	Ø42.7 mm	6061-T6 aluminum alloy	4.1 mm	$17	today
SM1.5RSF New	Ø31mm	6061-T6 aluminum alloy	3.9 mm	$16.47	today

SM05 Retaining Ring

Material: 6061-T6 aluminum alloy or 304 stainless steel;
Surface treatment: Black anodized;
Secures Ø12.7mm optical components;
Available in packs of 10;

The SM05 retaining ring from LBTEK is manufactured from 6061-T6 aluminum alloy with a black anodized surface finish. The peripheral groove is compatible with OWR-05A retaining ring key for securing Ø12.7 mm optical components. Typically, two retaining rings are used in lens tubes or coaxial mounts, one for positional fixation and the other for firmly clamping the optical component.

The SM05R retaining ring is used for the fixed lens mount FLF05A.

Product Model	Clear Aperture	Material	Quantity	Unit Price	Lead Time
SM05RS-P5	Ø11.4 mm	304 stainless steel	5	$24.97	today
SM05R	Ø11.4 mm	6061-T6 aluminum alloy	1	$2.61	today
SM05R-P10	Ø11.4 mm	6061-T6 aluminum alloy	10	$23.66	today

SM1 Snap Ring

Material: 6061-T6 aluminum alloy or 304 stainless steel;
Surface treatment: Black anodized;
Secures Ø25.4 mm optical components;
Available in packs of 10;

The SM1 retaining ring from LBTEK is manufactured from 6061-T6 aluminum alloy with a black anodized surface finish. The peripheral groove is compatible with OWR-1A retaining ring key for securing Ø25.4 mm optical components. Typically, two retaining rings are used in lens tubes or coaxial mounts, one for positional fixation and the other for firmly clamping the optical component.

The SM1R retaining ring is used for the FLF1A fixed lens mount.

Product Model	Clear Aperture	Material	Thickness	Quantity	Unit Price	Lead Time
SM1RS-P5	Ø23.0 mm	304 stainless steel	2.0 mm	5	$33.73	today
SM1RT	Ø23.0 mm	6061-T6 aluminum alloy	5.0 mm	1	$10.07	today
SM1R	Ø23.0 mm	6061-T6 aluminum alloy	2.0 mm	1	$4.05	today
SM1R-P10	Ø23.0 mm	6061-T6 aluminum alloy	2.0 mm	10	$37	today

SM1.5 Retaining Ring

Material: 6061-T6 Aluminum Alloy;
Surface Treatment: Black Anodized;
Secures Ø38.1 mm Optical Components;
Available in Packs of 10;

The SM1.5 retaining ring from LBTEK is manufactured from 6061-T6 aluminum alloy with a black anodized surface finish. The peripheral groove is compatible with OWR-U adjustable key for securing Ø38.1 mm optical components. Typically, two retaining rings are used in lens tubes or coaxial mounts, one for positional fixation and the other for firmly clamping the optical component.

The SM1.5R retaining ring is used for the fixed lens mount FLF1.5A.

	Product Model	Material	Quantity	Unit Price	Compare	Lead Time
	SM1.5R-P10	6061-T6 aluminum alloy	10	$50.86		today
	SM1.5R	6061-T6 aluminum alloy	1	$5.75		today

SM2 Retaining Ring

Material: 6061-T6 Aluminum Alloy;
Surface Treatment: Black Anodized;
Available in packs of 10;
Secures Ø50.8 mm optical components;

The SM2 retaining ring from LBTEK is manufactured from 6061-T6 aluminum alloy with a black anodized surface finish. The peripheral groove is compatible with OWR-2A retaining ring key for securing Ø50.8 mm optical components. Typically, two retaining rings are used in lens tubes or coaxial mounts, one for positional fixation and the other for firmly clamping the optical component.

The SM2R retaining ring is used for the fixed lens mount FLF2A.

	Product Model	Material	Quantity	Unit Price	Compare	Lead Time
	SM2R-P10	6061-T6 aluminum alloy	10	$52.82		today
	SM2R	6061-T6 aluminum alloy	1	$5.75		today

SM30 snap ring

Material: 6061-T6 Aluminum Alloy
Surface Treatment: Black Anodized
Secures Ø30mm Optical Components

The LBTEK SM30 retaining ring is made of 6061-T6 aluminum alloy with a black anodized surface finish. The surface slots are compatible with the OWR-U adjustable wrench, designed to secure Ø30 mm optical components. Typically, two retaining rings are used within a lens tube or coaxial plate to secure an optical element: one to fix the position and the other to clamp the optical component tightly.

SM30 retaining ring is used for SM30 lens sleeve SM30-8A

	Product Model	Material	Quantity	Unit Price	Compare	Lead Time
	SM30R New	6061-T6 aluminum alloy	1	$5.75		today

Snap ring