The hollow construction of these spanner wrenches allows SM-series retaining rings to be installed or adjusted without obscuring the beam path. They include guide flanges that prevent most optical surfaces from being scratched while the wrench is being inserted, and knurled handles that provide improved grip.
As shown to the right, the SPW602 additionally features an engraved depth scale with imperial and metric increments (0.02" and 0.5 mm, respectively), thereby enabling precise positioning of optics.
For retaining rings not covered by our standard spanner wrenches, please see the SPW801 Adjustable Spanner Wrench sold at the bottom of the page. The long blades on the SPW801 also prevent scratches caused by the guide flanges on lenses with high curvature.
Spanner Bits allow SM-series retaining rings to be installed or adjusted without damaging optics that may be in place. They feature a standard 1/4" hex shank that allows them to be used with anything from the included driver handle to a power drill with an appropriate adapter.
The SPB600 Spanner Wrench Bit Kit includes bits for SM05, SM1, and SM2 retaining rings, along with a driver handle with a 1/4" hex socket. An SM3 bit is sold separately. Each bit includes guide flanges that prevent most optical elements from being scratched while the bit is being inserted. When using lenses with high curvature, we recommend the SPW801 Adjustable Spanner Wrench sold below, which uses long blades that prevent scratches caused by the guide flanges.
If using these bits with a power drill, care should be taken to avoid overtightening the retaining ring due to the added torque created by the tool. Electric tools should be used at a low speed, and we recommend that the final tightening of the retaining ring be done by hand.
These spanner wrenches feature a hollow construction that allows thread adapters to be positioned without obscuring the beam path, enabling fine adjustment while a beam is being collimated. Their knurled handles provide improved grip, and their 1" length allows them to be used in tight spaces, such as within a 30 mm cage assembly.
These spanner wrenches are used to install and adjust our mounted aspheric lenses. Compatibility information is located on our aspheric lens webpages (see the table to the right). The SPW301 Spanner Wrench is additionally compatible with the retaining rings used in the S05LEDM LED Adapter, the S05LM9 Laser Diode Adapter, and our laser diode collimation and focusing tubes.
The spanner wrenches sold here feature a hollow construction that allows fine adjustment without obscuring the beam path. The guide flanges prevent optical surfaces from being scratched while the wrench is being inserted, and the knurled handles provide improved grip. Their compact 1" length allows them to be used in tight spaces. These spanner wrenches interconnect as shown in the photo in the Overview tab above, making it possible to reach retaining rings in longer lens tubes.
Thorlabs' Adjustable Spanner Wrench features a spanning range that is continuously adjustable from 0.12" to 2.89" (3.0 mm to 73.4 mm). It is capable of providing an exact fit for SM-series retaining rings as large as the SM3RR for Ø3" Lens Tubes and Mounts. The diameter spanned by the blades remains centered while the knurled knob is adjusted.
The reversible blades have a flat tip on one end intended for use with retaining rings, and an edge-offset fine point on the opposing end for adapters with holes. The blades extend 1.6" (40.7 mm) from the body of the wrench, helping to avoid scratching of short-focal-length lenses caused by the guide flanges on our standard spanner wrenches. To reverse the blades, a 0.050" (1.3 mm) balldriver or hex key is needed. Replacement blade pairs are available separately.
The SPW801 wrench withstands a maximum torque of 80 inch-pounds (9 N•m).