RK100-A Series 360-Degree Rotational Indexing Stages

RK100-A Series 360-Degree Rotational Indexing Stages - Image 2

RK100-A Series 360-Degree Rotational Indexing Stages - Image 3

RK100-A Series 360-Degree Rotational Indexing Stages - Image 4

RK100-A Series 360-Degree Rotational Indexing Stages - Image 5

RK100-A Series 360-Degree Rotational Indexing Stages

Price range: $33.00 through $37.00

Model

Clear

SKU: N/A Categories: Ø1 Inch Mirror Mount, Optical Mirror Mounts, Optomechanical Components

Product Description

360° continuous rotation with 1° indexing.
SM1 (1.035”-40) internal threads.
Compatible with mounting Ø1-inch polarizing optical components.
50mm hole spacing, suitable for installation on most translation stages or optical platforms.
M4 threaded hole at the bottom for rod installation, used in free-space experiments.

The indexing stage features a full ball bearing raceway. Continuous rotation is achieved by turning the knurled edge or knob of the platform. A laser-engraved alignment line on one corner assists with alignment. The dial is marked in 1° increments, with numerical markings every 10° for precise movement and repeatable positioning.

Specifications	Details
Dimensions	63.562.012.5mm
Adjustment Range	360° continuous rotation with 1° indexing
Central Aperture	SM1 (1.035”-40) internal threads
Thread Hole Type	Tabletop: 6x M4; Bottom: 1x M4
Material	7075 aluminum alloy

Model	Adjustment Method	Counterbore Spacing	Weight
RK100-A3	Knob adjustment	2x M6 through holes (diagonal)	107.1g
RK100-A4	Knurled edge	2x M4 counterbores, 2x M6 through holes (50*50mm spacing)	102.2g

Technical Description

Optical Knowledge Point: Common Optical Thread Size Standards

This is a thread specific to Thorlabs Inc. (USA) and not a commonly used optical thread. “SM” is the code for sewing machine threads in thread notation, but this American company uses it for internal and external thread connections of optical lenses and sleeves. The thread type is UNS (Unified National Special Thread) with a tolerance class of 2A/2B. A unique feature of this thread is that regardless of the diameter, the pitch is 40 threads per inch (TPI). Specific dimensions are as follows:

Series	Type	Thread (in)	Nominal Diameter (mm)	Minor Diameter (mm)	Pitch Diameter (mm)	Major Diameter (mm)
SM05	Internal	0.535-40	13.59	12.98±0.07	13.24±0.05	＞13.59
SM05	External	0.535-40	13.59	＜12.78	13.10±0.05	13.50±0.05
SM1	Internal	1.535-40	26.29	25.68±0.07	25.95±0.05	＞26.29
SM1	External	1.535-40	26.29	＜25.48	25.79±0.05	26.19±0.06
SM2	Internal	2.535-40	51.69	51.08±0.075	51.35±0.075	＞51.69
SM2	External	2.535-40	51.69	＜50.87	51.18±0.05	51.59±0.05

Product Description

The central aperture of the tabletop is an SM1 (1.035”-40) threaded hole with a depth of 11.8mm, and 6 M4 threaded holes are drilled around the circumference. The central hole includes one CSK3 retaining ring, which can clamp and fix Ø1-inch optical components (e.g., waveplates, polarizers). Compatible with SM1 series lens sleeves or other components.

(3) The mount can be installed with rods in a vertical configuration using the M4 threaded holes on the sides. Additionally, they can be used as platforms, directly mounted on optical platforms, breadboards, or other platforms through 2 or 4 through holes at the corners.