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    12 Products

    Probe Styli

    Our most general purpose probe styli, these Renishaw styli are used with both touch-trigger and scanning probes. When these styli touch your workpiece, they trigger your probe to send a signal and measure geometric features. The ball end is made of ruby, which is second only to diamond in hardness, so it won’t lose its shape or wear over time. It’s completely round and smooth to avoid touching your workpiece at more than one precise point, preventing inaccurate measurements. However, these probe styli don’t work well with aluminum or cast iron surfaces. Aluminum can rub off onto the ruby, and cast iron and ruby are prone to scratching each other during scanning jobs.
    As a rule of thumb, you should choose a stylus with the shortest length and largest ball-end diameter that works for your application. If a stylus is too long, it’s more likely to move farther than it should, reducing measurement accuracy. Larger ball ends reduce the possibility that the stem will accidentally touch your workpiece and interfere with the reading.
    Ruby Ball-End Styli
    Image of Product. Front orientation. Contains Annotated. Probe Styli. Ruby Ball-End Styli.
    M3 Mounting Thread—Styli with M2 or M3 threads are often used in coordinate measuring machines (CMMs).
    Tungsten Carbide Stem—Tungsten carbide stems are the stiffest and least likely to flex. Tungsten carbide can slightly expand in changing temperatures, so if you need precise measurements, use these styli in temperature-controlled environments.
    Carbon Fiber Stem—Carbon fiber stems are the most lightweight option, so they’re often found on longer styli.
    Material
    Ball
    End Dia.,
    mm
    Effective
    Working Lg., mm
    Overall
    Lg., mm
    Stem Dia.,
    mm
    Stem
    Body
    End Dia. Tolerance,
    mm
    Precision
    Grade
    Sphericity Tolerance,
    mm
    Mfr.
    Mfr. Model
    No.
    Each
    M3 × 0.5 mm
    14210.7Stainless Steel
    		Stainless Steel
    		-0.00013 to 0.000135-0.00013 to 0.00013RenishawA-5000-3551000000000000000
    1.522.5301Tungsten CarbideStainless Steel
    		-0.00013 to 0.000135-0.00013 to 0.00013RenishawA-5003-005100000000000000
    29.6211.4Stainless Steel
    		Stainless Steel
    		-0.00013 to 0.000135-0.00013 to 0.00013RenishawA-5000-355200000000000000
    232.5401.5Tungsten CarbideStainless Steel
    		-0.00013 to 0.000135-0.00013 to 0.00013RenishawA-5003-005300000000000000
    314.7211.5Stainless Steel
    		Stainless Steel
    		-0.00013 to 0.000135-0.00013 to 0.00013RenishawA-5000-355300000000000000
    1075754Carbon FiberStainless Steel
    		-0.00013 to 0.000135-0.00013 to 0.00013RenishawA-5003-70570000000000000
    121001004Carbon FiberStainless Steel
    		-0.00013 to 0.000135-0.00013 to 0.00013RenishawA-5003-74450000000000000
     
    Ruby Ball/Star-End Styli
    Image of Product. 5 Styli. Front orientation. Contains Annotated. Probe Styli. Ruby Ball/Star-End Styli, 5 Styli.

    5 Styli

    Ball/star styli combine up to 5 styli in one, so you can reach more of your workpiece at once. This means you won’t have to swap out styli as many times during a job. They are commonly used to inspect bores, shoulders, and grooves.
    M3 Mounting Thread—Styli with M2 or M3 threads are often used in coordinate measuring machines (CMMs).
    Material
    Ball
    No. of
    Styli
    End Dia.,
    mm
    Effective
    Working Lg., mm
    Overall
    Lg., mm
    Overall
    Wd., mm
    Stem Dia.,
    mm
    Stem
    Body
    End Dia. Tolerance,
    mm
    Precision
    Grade
    Sphericity Tolerance,
    mm
    Mfr.
    Mfr. Model
    No.
    Each
    M3 × 0.5 mm
    521221.5301.4Stainless Steel
    		Stainless Steel
    		-0.00013 to 0.000135-0.00013 to 0.00013RenishawA-5003-007600000000000000
     

    Probe Styli Kits

    Image of Product. Front orientation. Probe Styli. Probe Styli Kits.
    Keep a variety of common Renishaw stylus sizes, extensions, and tools on hand. When styli touch a workpiece, they trigger your probe to send a signal and measure geometric features.
    Make sure the thread size of the styli in the kit you choose fits your application.
    These kits all include ruby ball styli, which can be used in a wide variety of applications, from touch-trigger to scanning probes. Ruby is second only to diamond in hardness, so the ball end won’t lose its shape or wear over time. It’s completely round and smooth to avoid touching your workpiece at more than one precise point, preventing inaccurate measurements. However, these probe styli don’t work well with aluminum or cast iron surfaces. Aluminum can rub off onto the ruby, and cast iron and ruby are prone to scratching each other during scanning jobs.
    As a rule of thumb, you should use a stylus with the shortest length and largest ball-end diameter that works for your application. If a stylus is too long, it’s more likely to move farther than it should, reducing measurement accuracy. Larger ball ends minimize the risk that the stem will accidentally touch your workpiece and interfere with the reading.
    All kits come with stylus installation tools, which give you a handle to turn so it’s easier to thread a stylus into your probe. Slide them into the hole at the top of your probe stylus. The included stylus extensions are useful if you need to reach deep or difficult-to-access areas.
    EWL (effective working length) is measured from the beginning of the stem to the center of the ball or disc end.
    M3 Mounting Thread—Styli with M2 or M3 threads are often used in coordinate measuring machines (CMMs).
    One 35 mm Dia. × 5 mm Thick. High-Carbon Steel Disc Stylus—Disc styli fit in undercuts and grooves within bores that are too narrow for ball styli. However, because the stylus end is flat, they can’t measure in as many directions as ball styli. Use them with both touch-trigger and scanning probes.
    No. of
    Pieces
    Includes
    Container
    Type
    Body Material
    Mfr.
    Mfr. Model
    No.
    Each
    M3 × 0.5 mm
     
    High-Carbon Steel End, Ruby End
    10One 1 mm Dia. Ruby Ball Stylus with Stainless Steel Stem—21 mm O'all Lg. (4 mm EWL)
    One 2 mm Dia. Ruby Ball Stylus with Tungsten Carbide Stem—40 mm O'all Lg. (32.5 mm EWL)
    One 3 mm Dia. Ruby Ball Stylus with Tungsten Carbide Stem—50 mm O'all Lg. (43.7 mm EWL)
    One 4 mm Dia. Ruby Ball Stylus with Tungsten Carbide Stem—40 mm O'all Lg. (36 mm EWL)
    One 5 mm Dia. Ruby Ball Stylus with Stainless Steel Stem—21 mm O'all Lg. (21 mm EWL)
    One 5 mm Dia. Ruby Ball Stylus with Ceramic Stem—50 mm O'all Lg. (50 mm EWL)
    One 35 mm Dia. × 5 mm Thick. High-Carbon Steel Disc Stylus
    One 50 mm Lg. Stylus Extension
    Two Stylus Installation Tools    		Plastic CaseStainless Steel
    		RenishawA-5004-688000000000000000
     

    Probe Styli for Undercuts and Grooves

    Image of ProductInUse. Top orientation. Probe Styli. Probe Styli for Undercuts and Grooves.
    Slip these Renishaw styli into undercuts and grooves that are too narrow for other styli. When the side of the disc touches your workpiece, these styli trigger your coordinate measuring machine (CMM) probe to send a signal and measure geometric features. The disc is completely round, just like a ball stylus, so these styli contact your workpiece with the same precision. However, they can’t measure in as many directions as ball styli. When space is tight, they’re a great alternative to star styli for inspecting features inside holes. They work with both touch-trigger and scanning probes.
    High-Carbon Steel Disc-End Styli
    Image of Product. Stylus. Top orientation. Contains Annotated. Probe Styli. Probe Styli for Undercuts and Grooves, High-Carbon Steel Disc-End Styli.

    Stylus

    End,
    mm
    Material
    Dia.
    Thk.
    Overall
    Lg., mm
    Stem Dia.,
    mm
    Stem
    Body
    End Dia. Tolerance,
    mm
    Mfr.
    Mfr. Model
    No.
    Each
    M3 × 0.5 mm
    3556.57Stainless Steel
    		Stainless Steel
    		-0.001 to 0.001RenishawA-5000-761200000000000000
     

    Large Diameter Probe Styli

    Probe large bores and deep features—these Renishaw styli have a contact surface that’s 1.5x the size of that on our largest ball styli. When they touch a workpiece, they trigger your coordinate measuring machine (CMM) probe to send a signal and measure geometric features. The size of the half ball keeps the stem from accidentally touching your part, preventing your probe from falsely triggering and measuring inaccurately. It also evens out the inconsistencies from measuring rough and textured surfaces, making these styli a good choice for use on threads. To minimize their weight, the half ball is hollow and made of lightweight ceramic.
    Ceramic Half Ball-End Styli
    Image of Product. Top orientation. Probe Styli. Large Diameter Probe Styli.
    Image of Attribute. Front orientation. Contains Annotated. Large Diameter Probe Styli.
    End Dia.,
    mm
    Overall
    Lg., mm
    Stem Dia.,
    mm
    Stem Material
    End Dia. Tolerance,
    mm
    Mfr.
    Mfr. Model
    No.
    Each
    M3 × 0.5 mm
    18125Stainless Steel
    		-0.001 to 0.001RenishawA-5004-372800000000000000
    3017.25Stainless Steel
    		-0.001 to 0.001RenishawA-5000-78140000000000000
     
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