Renishaw M2 .7 mm Ruby Ball, Tungsten Carbide Stem, L 10 mm CMM Styli New with Warranty A-5000-7801

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Product Description


New: A brand-new, unused, unopened, undamaged item in its original packaging.



Country of Manufacture:   UNITED KINGDOM

Brand:    RENISHAW


MPN:   A-5000-7801



Item Description

Renishaw M2 Ø0.7 mm ruby ball, tungsten carbide stem, L 10 mm, EWL 4 mm Styli with 1 Year Warranty.


Straight Styli  

Straight styli are designed to inspect simple features where direct, unobstructed contact with a measured surface is possible. A tungsten carbide stem provides exceptional rigidity, particularly for styli with small ball and stem diameters. Ruby is regarded as the industry standard for stylus tips. It is one of the hardest materials available and suitable for most applications. Due to adhesive pickup, ruby tips are not recommended for scanning aluminium parts.

Equivalent to Mitutoyo part number: K651236. Equivalent to Q-Mark part number: TM2-0710.



M2 Ø0.7 mm ruby ball, tungsten carbide stem, L 10 mm, EWL 4 mm 

A few simple rules can be applied to maximize accuracy for most probing applications.

Technical Table

Ball diameter (mm) 0.7
Centre styli N
EWL (mm) 4
Holder material Stainless steel
Overall length (mm) 10
Stem diameter (mm) 0.5
Stem material Tungsten carbide
Thread M2
Tip material Ruby



A = ball diameter = 0.7 mm (0.012)

B = overall length = 10.0 (0.40)

C = stem diameter = 0.2 (0.01)

Stylus terminology 

Overall length

Renishaw uses a standard description of overall length, measured from the rear mounting face of the stylus to the centre of the ball. 

Effective working length (EWL)

This is measured from the centre of the ball to the point at which the stem will foul against the feature when measuring 'normal' to the part.  

Rules for choosing a stylus

A few simple rules for stylus selection can be applied to maximize accuracy for most probing applications  

Keep styli short

The more the stylus bends or deflects, the lower the accuracy. Probing with the minimum stylus length for your application is the best option. 

Minimise joints

Every time you join styli and extensions, you introduce potential bending and deflection points. Try, wherever possible, to keep to the minimum number of pieces possible for your application.

Keep the stylus ball as large as possible

There are several reasons for this:

* Maximises your ball/stem clearance, thereby reducing the chance of false triggers caused by 'shanking out' on the stylus stem, and increasing the EWL *
* Larger ball allows a larger stem diameter, increasing the stiffness of the stylus *
* Larger ruby ball reduces the effect of the surface finish of the component being inspected *

EWL can also be affected by assembly tolerances. For this reason Renishaw styli are assembled to exacting standards in controlled conditions.


This is by far the best price you will find on a Renishaw M2 Ø0.7 mm Ruby Ball,

Tungsten Carbide Stem, L 10 mm, EWL 4 mm Styli with 1 Year Warranty. Purchase

with confidence from a Paypal verified retailer. If what you order is not what you

receive you will be refunded the full purchase price of this sale. Metrology Parts

would like the opportunity to earn your business for this sale and all of your future 

Renishaw needs. If you have any questions feel free to contact us. With 36 plus years

of experience with Renishaw products we can help with all of your application needs

as well as your after sales support.

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