Mahr Probe Arm MarSurf CPG

Mahr Probe Arm MarSurf CPG The Mahr MarSurf CPG Series is the dedicated contour probe arm family for Mahr's MarSurf CD, GD, VD, and LD contour measuring stations. Purpose-engineered for high-speed, high-accuracy contour measurement on a wide range of workpiece geometries including flat surfaces, shoulders, recesses, grooves, radii, threads, and angled features CPG probe arms are the consumable interface between the MarSurf instrument's precision Z-axis and the workpiece surface, and their selection directly determines what geometry can be reached, at what stylus angle, and over what measuring range. The T-type CPG probe arm (order no. 6852804 CPG T 12-210-25/12°) is the reference configuration within the CPG family: a straight contour probe arm with a 12mm front height, a 210mm arm length from mount to pivot point, and a 25µm diamond stylus tip ground to a 12° included angle at the tip. The total measuring range of this configuration is 42mm (±21mm), with 4.5mm of usable probe clearance above and below the arm body for navigating feature geometry around shoulders, steps, and recesses. The 25µm radius and 12° angle are matched to contour measurement applications requiring fine lateral resolution while maintaining adequate tip robustness for production-environment stylus life distinguishing the CPG contour tip from the 2µm roughness-grade tips used in the BFW 250 probe system, which are not suited to contour tracing loads and speeds. The CPG probe arms are designed for high measuring speeds, combining rigidity with high dynamics and low vibration behavior at the same time, thus fulfilling the high demands on accuracy and measuring reliability. Three engineering choices define the CPG platform's operational advantage over earlier probe arm generations. First, the magnetic mount allows the probe arm to be detached from the MarSurf measuring system in a single move and replaced with a different CPG probe arm without tools and critically, without recalibration of the arm or the instrument. The probe arms can be easily detached from the measuring system in one step and replaced with another probe arm, and you do not need to recalibrate the probe and measuring station. Second, each CPG probe arm contains an embedded identification chip that communicates the arm's identity, geometry parameters, and calibration status to the measuring station at the moment of installation. The new probe arms of the MarSurf CD series are equipped with a chip so that they are automatically recognized by the measuring station, and users always measure with the probe arm that is appropriate for each workpiece and measurement program. Third, the measuring station uses the chip-identified probe arm geometry to automatically select the correct measuring force eliminating manual force setup errors when switching between probe arms of different mass and geometry during a multi-part measurement sequence. The CPG T-type probe arm is the standard configuration for general contour measurement in the horizontal measurement plane. The CPG family also includes angled, extended-reach, and miniaturized configurations for deep bores, narrow grooves, and hard-to-access features all sharing the same magnetic mount, chip identification, and no-recalibration-on-swap operational model. All CPG probe arms are compatible with the full MarSurf CD 140 and CD 140 AG 11 series, MarSurf GD 25/120/140, MarSurf VD 140/280, and MarSurf LD 140/280 platforms. Key Features Magnetic Tool-Free Probe Arm Swap with Zero Recalibration - The CPG probe arm mounts magnetically to the MarSurf probe system in a single motion and releases without tools, allowing probe arm changes between workpiece geometries in seconds rather than minutes; because the magnetic mount is a defined kinematic seating, no recalibration of the arm or the measuring station is required after the swap — eliminating the calibration overhead that previously made frequent probe arm changes impractical in production pacing environments. Embedded Identification Chip - Each CPG probe arm contains an embedded chip that the MarSurf measuring station reads at the moment of installation, instantly identifying the arm's geometry, calibration data, and appropriate measuring force range; the instrument then sets probe force automatically for that specific arm, preventing operator-induced force selection errors when cycling between multiple probe arm configurations on the same station or measurement program. High-Rigidity, Low-Vibration Construction for High-Speed Contour Tracing - CPG probe arms are engineered specifically for the high measuring and positioning speeds of the MarSurf CD/GD/VD/LD platforms up to 10mm/s measuring speed and up to 200mm/s positioning speed with a structural design that combines high bending stiffness with low inertia and vibration response, maintaining measurement accuracy and tip-to-surface contact fidelity at speeds where elastically compliant probe arms would introduce dynamic tracing errors. 25µm Diamond Stylus Tip at 12° - The CPG T 12-210-25/12° uses a diamond stylus ground to 25µm tip radius at a 12° included tip angle, providing the lateral resolution and surface-following geometry needed for accurate contour tracing on radii, chamfers, thread flanks, angular transitions, and sharp feature boundaries — while maintaining the stylus robustness required for contour measurement loads and speeds, which are substantially higher than those used in surface roughness measurement. 42mm Measuring Range (±21mm) with 4.5mm Feature Clearance Above and Below the Arm - The CPG T 12-210-25/12° provides a 42mm total measuring range (±21mm from neutral position) at a 210mm arm length to pivot, covering the full Z-axis excursion needed for most production contour measurement tasks; the 4.5mm of usable probe clearance both above and below the arm body allows measurement near shoulders, steps, and surface transitions without mechanical interference from the arm body itself a geometry constraint that determines the minimum accessible feature depth on recessed or stepped workpieces. Compatible Across the Full MarSurf Contour Platform - CD, GD, VD, and LD Series - CPG probe arms are the standard probe arm format for the complete Mahr MarSurf contour measuring instrument family, including the MarSurf CD 140, CD 140 AG 11, CD 140 AF, GD 25/120/140, VD 140/280, and LD 140/280 allowing a single investment in CPG probe arm configurations to serve any current or future MarSurf contour instrument in a facility, with probe arms moving freely between instruments without compatibility restrictions or additional calibration overhead. Specifications SKU Type Specification 6852800 Probe CPG A 36-350-25/12° 6852801 Probe CPG A 36-350-500 6852802 Probe CPG A 36-350-25/30° 6852803 Probe CPG E 6-210-25/19° 6852804 Probe CPG T 12-210-25/12° 6852805 Probe CPG A 23-350-25/12° 6852806 Probe CPG B 8-350-25/19° 6852810 Probe CPG A 62-350-25/12° 6852811 Probe CPG T 35-350-500 6852812 Probe CPG T 18-350-25/19° 6852813 Probe CPG A 20-210-5/90° 6852814 Probe CPG E 2,5-210-25/19° s45 6852815 Probe CPG E 3-210-25/19° 6852816 Probe CPG E 6-210-25/15° 6852817 Probe CPG A 36-420-25/12° 6852818 Probe CPG A 23-490-25/12° 6852819 Probe CPG A 36-210-25/30° q50 Items Included Mahr MarSurf contour probe arm