Laser 2000

Extended Contact Ball Bearing Guide

There are 5 variations in for extended contact ball bearing guide linear stages, these are separated by the linear motion of the stage (X, XY, Z, XZ, XYZ).

The products which involve these variations include, the TSD (Extended contact ball bearing guide method), TSDH (High precision version), TSDT (low profile) and TADC (cost effective aluminium stages). Some stages also come with the vertical option of linear movement which is denote by L in the product code and opposite model (inverse motions) denoted by R in the product code.

For more information, please find the specifications in the download tab or contact our experts.


Ultra thin steel stages (10mm) provide high stiffness and load capacity in a very low profile. Stage heights are 40% lower and the overall weight is 35% lighter than standard TSD stages. (TSDH)
  • Opposed locking clamp to maximize locking
  • Low-profile is ideal for assembling into systems with limited space or optical applications that require low beam
Hardened steel linear stages with integrated bearing ways and a black chrome finish. Our “Extended Contact” technology yields superior stability, stiffness, accuracy, and durability. These XY stages are integrated and therefore have a lower profile vs. (2) single axis stages combined (TSDS).

There are options for micrometer position and fine pitch screws.


Aluminum translation stage with high stiffness bearing ways. Cost effective and light weight. (TADC)
  • Unique steel bearing ways with 4-point extended contact yield stable load capacity in all
  • Long life, maintenance free.


Linear stages based on extended contact ball bearing guide which provides high precision, load capacity, stiffness and durability.  Available in 15, 25, 40, 60, 65, 80, 100, 120 mm square stage sizes and others on request.

High Load Capacity and High Stiffness
The four-array contact structure achieves high load capacity and high stiffness (13 times stiffer than the V groove).

As shown in Fig-1, ball guides are machined across the arcs so that they have R groove structure and good contact with a ball allowing stable load capacity against the load in the directions where contact with the ball occurs frequently.


High Durability

Long life and free of maintenance

Fig-2 shows the pressure distribution of the R groove and the flat surface. As shown in the figure, pressure exerted on the R groove is dispersed and does not reach inside. Thus, metal fatigue and wear are reduced.

High Precision

The integral (simultaneous) machining achieves high precision (straightness: 0.7 μm or lower)
As shown in Fig-3, the top and bottom plates are integrally and simultaneously machined using an originally devised machining jig to minimize respective machining errors. That is, to maintain high precision, these plates are machined in virtually the same state as when a ball is inside.

Low Profile

Reduction in the number of parts enables low profiling
Fig-4 shows a comparison of thickness of a crossed roller stage and a ball guide stage. The integration of the guides into the top and bottom plates allows low profiling of the ball guide stage virtually the same state as when a ball is inside.


Guide Method Extended Contact Ball Bearing Guide
Part Number



Primary Material Steel / Stainless steel Aluminum






Outline of Guide

A guide is directly pro- cessed on the lower and upper plates of the stage, quenched and ground.

Steel balls are positioned between them.

Positioning slide having cylindrical rollers arranged orthogonally one after another in a V groove rail.
Stage Thickness
Travel Accuracy

◎ = High Quality

○ = Good Quality

△ = Average Quality

For more specifications on individual products please see our datasheets in the downloads tab.

TSD Model Datasheet
TSDH Model Datasheet
TSDT Model Datasheet
TADC Model Datasheet

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Extended Contact Ball Bearing Guide Linear Stages

Ask the Expert

If you’re interested in the products shown here, or have questions about something you can’t find on our website, please get in touch through the form below.

Our knowledgeable sales team will be happy to help. We can normally source exactly what you need, or work with you to come up with custom solutions.

Alternatively, just call +44 (0) 1933 461 666 and ask to speak to the Photonics team.