- and Touch Probes YOUR MEASURING TASKS ARE SENSITIVE. MARTEST IS HIGHLY SENSITIVE. Since 1936 Mahr is one of the leading global producers of test indicators, we have achieved this with the continuous advancement of our products and with unrelenting commitment to produce high quality products that not only meet customer requirements but also exceed them. We have also increased research and development in order to satisfy the demands and requirements of the market, however our core philosophy is to offer our customer a highly accurate and simple solution for various measuring tasks. With the MarTest series of test indicators there is not just a broad product range but also a wide variety of accessories at you disposal. The sensitive computer-optimized shockproof mechanism of the test indicator ensures maximum security and precision. MarTest is also ideal for use in workshop conditions due the dial being sealed thus being impervious to the penetration of liquids.
+ and Touch Probes and Touch Probes Test Indicators Overview 4-2 Standard Version MarTest 8 S / 8 SG / 8 SA / 8 SGA metric 4-4 MarTest 81 S1 / 81 S / 81 SG / 81 SGI inch 4-4 With Higher Resolution MarTest 8 SM / 8 SGM / 8 SGE metric 4-5 MarTest 81 SM / 81 SGM / 81 SGE inch 4-5 With longer Styli MarTest 8 SL / 8 SGL / 8 SGB metric 4-6 MarTest 81 SL / 81 SGL inch 4-6 Horizontal Version MarTest 8 H metric 4-7 MarTest 81 H inch 4-7 Vertical Version MarTest 8 V / 8 VGM metric 4-7 MarTest 81 V / 81 VGM inch 4-7 With Larger Measuring Range MarTest 8 SR / 8 SRM metric 4-8 MarTest 81 SR / 81 SRM inch 4-8 Accessories 4-8 3D Touch Probes Water proof, with Digital Display MarTest 82 EW 4-12 Water proof, with Analog Display MarTest 82 W 4-14
- 4-2 Overview MarTest - Versions Standard Measuring Dial style Readings Styli Order no. Order no. range with Kit* 8 S ±.4 mm -4-.1 mm 14.5 mm 4352 21539 8 SG ±.4 mm -4-.1 mm 14.5 mm 4372 2153 8 SA ±.25 mm -25-.1 mm 14.5 mm 4312 215343 8 SGA ±.25 mm -25-.1 mm 14.5 mm 43125 215344 81 S1 ±.15" -15-.1" 14.5 mm 43596 215317 81 S ±.15" -15-.5" 14.5 mm 43595 215316 81 SG ±.15" -15-.5" 14.5 mm 43795 215318 81 SGI ±.15" (±.3 mm) -15- (-3-).5" (.1 mm) 14.5 mm 43797 215311 Extra Long Styli 8 SL ±.25 mm -25-.1 mm 41.24 mm 4362 215312 8 SGL ±.25 mm -25-.1 mm 41.24 mm 43625 215313 8 SGB ±.5 mm -5-.1 mm 32.325 mm 4313 215346 81 SL ±." --.5" 41.24 mm 43695 215319 81 SGL ±." --.5" 41.24 mm 43696 21532 Higher Resolution 8 SM ±.1 mm --.2 mm 14.5 mm 43815 215315 8 SGM ±.1 mm --.2 mm 14.5 mm 4382 215314 8 SGE ±.7 mm -7-.1 mm 9.155 mm 43822 215345 81 SM ±.4" -4-.1" 14.5 mm 43896 215321 81 SGM ±.4" -4-.1" 14.5 mm 43897 215322 81 SGE ±.4" -4-.5" 14.5 mm 438985 215323 Larger Measuring Range 8 SR ±.8 mm -4-.1 mm 14.5 mm 43725 215348 8 SRM ±.2 mm --.2 mm 14.5 mm 43825 215349 81 SR ±.3" -15-.5" 14.5 mm 43796 21535 81 SRM ±.8" -4-.1" 14.5 mm 43898 215351 Horizontal Models 8 H ±.4 mm -4-.1mm 14.5 mm 4332 215328 81 H ±.15" -15-.5" 14.5 mm 43395 215324 Vertical Models 8 V ±.4 mm -4-.1 mm 14.5 mm 4322 215327 8 VGM ±.1 mm --.2 mm 14.5 mm 43225 215347 81 V ±.15" -15-.5" 14.5 mm 43295 215325 81 VGM ±.4" -4-.1" 14.5 mm 43296 215326 * Only available in North America, Canada and Mexico; includes holding bar and clamp
+ 4-3 Design Features Pointer Gear segment lever Clearance compensating spring Dial face is sealed with an O-Ring Dovetail guide way Contact point with carbide ball Mechanism Shockproof Anti magnetic Movement bearings are jewelled with 8 precious stones Automatic matching to sensing direction, thus ensuring error-free reading Dovetail guide ways Measuring force spring Shock absorber SHOCK PROOF bearings Double lever supported in ball bearings, overload protection provided by slip clutch MarTest - Applications The Test Indicator serves as an instrument for comparative measurements. It can be used in any type of measuring stand. Due to the swiveling feature of the styli and the reversal of its sensing direction, the MarTest Test Indicator is suitable for various measuring and inspection tasks. Areas of application for example are: Concentricity of a shaft Aligning a surface Concentricity of a sleeve Testing parallelism Centering of a bore Testing concentricity and run-out of shafts and bores Testing of parallelism and alignment of surfaces in engineering and tool making Reference to application: l = 14.5 mm l = 41.2 mm Use only the styli whose length is engraved on the side of the housing. For accurate measurements the axis of the contact point must be perpendicular to the measuring direction (fig. 1). If this is not possible, it is necessary to multiply the reading on the dial with a correction factor, which depends on angle a (fig. 2). The correction factor is negligible for angles below 15. Angle α 15 3 45 6 Corr.-Factor.96.87.7.5 Example: Angle α: Reading on dial: Meas. result: 3 (estimated).38 mm.38 x.87 =.33 mm
- 4-4 MarTest standard versions 8 S 8 SGA SHOCK PROOF 8 SA 8 SG Technical Data Measuring Readings Dial dia. Measuring Accuracy Order no. Order no. range force Kit 8 S ±.4 mm.1 mm 27.5 mm.15 N µm 3 µm 4352 21539 8 SG ±.4 mm.1 mm 38 mm.15 N µm 3 µm 4372 2153 8 SA ±.25 mm.1 mm 27.5 mm.1 N 5 µm 3 µm 4312 215343 8 SGA ±.25 mm.1 mm 38 mm.1 N 5 µm 3 µm 43125 215344 81 S1 ±.15.1 1.1.15 N.4.12 43596 215317 81 S ±.15.5 1.1.15 N.4.12 43595 215316 81 SG ±.15.5 1.5.15 N.4.12 43795 215318 81 SGI ±.15 (±.3 mm).5 (.1 mm) 1.5.15 N.4.12 43797 215311 Scope of supply: Plastic storage case, spanner for changing the styli, styli dia. 2 mm, mounting shaft 8 a8 (for metric versions), mounting shaft 8 a6 (8 SA, 8 SGA), mounting shaft 8 a3/8 (for inch versions) f e f u DIN 227 81 S1 81 S 26 49,5 5 5 5 5 17 MarTest.1" 15 MarTest.5" 15 ø 4,5* ø 3** 81 SG 5 5 81 SGI 5 5 75 8 99 MarTest.5" 15 2.5" /,1mm 3 MarTest 3 15 2 1 ø 2 13,6 17,8 9 * 8 SG, 8 SGA, 81 SG, 81 SGI ** 8 S, 8 SA, 81 S1, 81 S
+ 4-5 MarTest with resolution.2 mm/.1 mm for higher accuracy SHOCK PROOF 8 SM 8 SGM 8 SGE Technical Data Measuring Readings Dial dia. Measuring Accuracy Order no. Order no. range force Kit 8 SM ±.1 mm.2 mm 27.5 mm.15 N 3 µm 2 µm 43815 215315 8 SGM ±.1 mm.2 mm 38 mm.15 N 3 µm 2 µm 4382 215314 8 SGE ±.7 mm.1 mm 38 mm.2 N 3 µm 2 µm 43822 215345 81 SM ±.4.1 1.1.15 N.12.8 43896 215321 81 SGM ±.4.1 1.5.15 N.12.8 43897 215322 81 SGE ±.4.5 1.5.15 N.12.8 438985 215323 f e f u DIN 227 Scope of supply: Plastic storage case, spanner for changing the styli, styli dia. 2 mm, mounting shaft 8 a8 (for metric versions), mounting shaft 8 a3/8 (for inch versions) 81 SM 1 1 49,5 26 17 2 3 MarTest.1" 4 3 2 ø 4,5* ø 3** 81 SGM 81 SGE 75 7*** 99 94*** 2 1 3 MarTest.1" 4 1 3 2 2 1 3 MarTest.5" 4 1 3 2 1 13,6 8,3*** ø 2 17,8 9,1*** 9 8 * 8 SGM, 8 SGE, 81 SGM, 81 SGE ** 8 SM, 81 SM *** 8 SGE
- 4-6 MarTest with extra long styli for measuring in even difficult to access positions 8 SL 8 SGL SHOCK PROOF 8 SGB Technical Data Measuring Readings Dial dia. Measuring Accuracy Order no. Order no. range force Kit f e f u 8 SL ±.25 mm.1 mm 27.5 mm.7 N µm 5 µm 4362 215312 8 SGL ±.25 mm.1 mm 38 mm.7 N µm 5 µm 43625 215313 8 SGB ±.5 mm.1 mm 38 mm.7 N µm 4 µm 4313 215346 81 SL ±..5 1.1.7 N.4.2 43695 215319 81 SGL ±..5 1.5.7 N.4.2 43696 21532 Scope of supply: Plastic storage case, spanner for changing the styli, styli dia. 2 mm, mounting shaft 8 a8 (for metric versions), mounting shaft 8 a6 (8 SGB), mounting shaft 8 a3/8 (for inch versions) 81 SL 81 SGL 49,5 26 4 6 2 2 MarTest.5" 8 8 4 6 4 6 2 8 MarTest.5" 2 8 4 6 ø 4,5* ø 3** 17 2 93*** 8 126 117*** 1 * 8 SGL, 81 SGL, 8 SGB ** 8 SL, 81 SL *** 8 SGB 4,3 (31,4***) 44,6 (35,7***) ø 2 9
+ 4-7 MarTest styli can positioned horizontally to the dial face 8h6 13,6 56 53 17 SHOCK PROOF ø 3 29 9 8 H ø 2 1 Technical Data Measuring Readings Dial dia. Measuring Accuracy Order no. Order no. range force Kit 8 H ±.4 mm.1 mm 27.5 mm.25 N µm 3 µm 4332 215328 81 H ±.15.5 1.1.25 N.4.12 43395 215324 Scope of supply: Plastic storage case, spanner for changing the styli, styli dia. 2 mm, mounting shaft 8 a8 (for metric versions), mounting shaft 8 a3/8 (for inch versions) f e f u DIN 227 MarTest vertical model SHOCK PROOF 67 53 17 17,8 ø 2 13,6 ø 3** ø 4,5* 8 V 8 VGM 1 9 * 8 VGM, 81 VGM ** 8 V, 81 V Technical Data Measuring Readings Dial dia. Measuring Accuracy Order no. Order no. range force Kit 8 V ±.4 mm.1 mm 27.5 mm.2 N µm 3 µm 4322 215327 8 VGM ±.1 mm.2 mm 38 mm.25 N 3 µm 2 µm 43225 215347 81 V ±.15.5 1.1.2 N.4.12 43295 215325 81 VGM ±.4.1 1.5.25 N.12.8 43296 215326 Scope of supply: Plastic storage case, spanner for changing the styli, styli dia. 2 mm, mounting shaft 8 a8 (for metric versions), mounting shaft 8 a3/8 (for inch versions) f e f u DIN 227
- 4-8 MarTest with larger measuring range 49,5 26 8 SR/SRM SHOCK PROOF ø 4,5 17 8 SRM 75 8 1 13,6 17,8 99 ø 2 9 Technical Data Measuring Readings Dial dia. Measuring Accuracy Order no. Order no. range force Kit f e f u 8 SR ±.8 mm.1 mm 38 mm.15 N µm 4 µm 43725 215348 8 SRM ±.2 mm.2 mm 38 mm.15 N 3 µm 3 µm 43825 215349 81 SR ±.3.5 1.5.15 N.4.16 43796 21535 81 SRM ±.8.1 1.5.15 N.12.12 43898 215351 Scope of supply: Plastic storage case, spanner for changing the styli, styli dia. 2 mm, mounting shaft 8 a8 (for metric versions), mounting shaft 8 a3/8 (for inch versions) MarTest - Accessories Styluses with ruby contact point M2 l d Styluses with carbide contact point Spanner for changing the styluses 435868 Model Styluses Stylus Carbide contact point Ruby contact point length l d d Cat.-no. ø 1 mm ø 2 mm ø 3 mm Cat.-no. ø 2 mm 8 S/81 S1/81 S 8 SG/81 SG 8 SA 8 SGA 8 SM/81 SM 8 SGM/81 SGM 81 SGE 14.5 mm 8 ts 43587 43585 435871 8 tsr 43951 8 SR/81 SR 8 SRM/81 SRM 8 H/81 H 8 V/81 V 8 VGM/81 VGM 8 SGE 9.1 mm 8 te 438851 43885 438852 8 ter 4395 8 SL/81 SL 8 SGL/81 SGL 41.2 mm 8 tl 436851 43685 436853 8 tlr 43953 8 SGB 32.3 mm 8 tb 431851 43185 431852 8 tbr 43952
+ 4-9 Martest - Accessories Mounting shaft for dovetail Mounting shaft dia. d Order no. mm 8 a8 8 435865 8 a6 6 431865 8 a4 4 435885 8 a1/4 1/4 435895 8 a3/8 3/8 435875 Stand 81 p 25 17 8 a ø12 ød Centering support rods 81 v For aligning and centering work pieces on machine tools Swivel mounting clamp and fine adjustment Stainless steel rods Mounting bore dia. 8 mm Swivel range of mounting clamp 18 81 v Indicator not included. Order no. 4397 With swivel holder Base with V-groove 14 Total height 15 mm Mounting bore dia. 4 and 8 mm Column dia. 8 mm Base surface 65 x 4 mm max. 13 ø14 18 Order no. 4399 Indicator not included. Leveling Table TE-2 Cuts set-up time 6% or more for many height gage measurements. The leveling table, TE-2, permits you to quickly bring the surface of a part into alignment with a surface plate in both planes. Completely eliminates shimming. Saves so much time that, used only occasionally, it will pay for itself in two weeks. The top plate is stress-relieved steel providing about 67 square inches of work area. It is drilled and tapped for fixtures. Fine pitch screws and large knobs assure precisely controlled adjustments. Works with any type of height gage. Operation is simple. Height gage readings are taken at edges of the surface to be aligned. Each plate, independently adjustable at right angles to the other, is angled as required for precise alignment. Flatness =.25 mm /.1 Adjustment Top Plate Bottom Plate Total ± 1 3' ± 1 3' Typical checks which require careful positioning of work because rest surface is not sufficiently parallel to other work surfaces. Leveling Table compensates for error quickly, drastically reduces set-up time. Parallelism Step Height Flatness Center distance
- 4- Martest - Accessories Holder 8 h Ø6h6 Universal centering support frame 8 b Order no. 435893 ø8 a 9 b Dimensions Order no. a b 8 h1 9x9 435888 8 h2 1/4 x 1/2 4 435889 58 ø4 3 Ø6 H7 44 6 Indicator not included. Universal clamp 8 k Universal holder with dovetail clamp 8 Ød2 Ød1 6 8 hs8 8 h1 with 8 k8 6 b a Ø c Dimensions Order no. dia. d1 dia. d2 8 k8 4 8 435891 8 k3/8 5/32 3/8 435892 Indicator not included. Dimensions Order no. a b dia. c 8 hs8 124 8 435886 8 hs3/8 4 5 3/8 435887 Indicator not included. Ball Clamp Dovetail and ball for indicator mounting and omni-irectional orientation Order no. AT-5 Double-jointed Clamp Reaches up to 127 mm / 5 with easy positioning for many applications including milling machine and Jig Borers Order no. AT- Jig Borer Attachment Furnished with two rods and clamp for fast machine mounting Order no. RD-21 Holding Bar Normally furnished with MarTest models. Three-inch length provides ample reach for most applications Order no. HB-2157 Swivel Clamp Normally furnished with MarTest models. Allows indicator to be mounted on most indicator stands and fixtures Order no. CP-2199
+ 4-11 Martest - Accessories Test Stand 1492B Use with any MarTest Indicator - Support arms stepped at one end (.218in dia.) for Swivel Clamp (CP-2199). Accommodates Vertical and Horizontal lug back mounts for AGD type Indicators. Bases have powerful ON/OFF permanent magnets which hold from any of four faces - three sides or bottom. Indicator not included. Base Dimensions Main Post Support Arm Order no. W x L x H Length Diameter Length Diameter mm (inch) mm/inch mm/inch mm/inch mm/inch 6 x 48 x 59 (2.4 x 1.9 x 2.2 ) 178/ 7 /.47 165/ 6.5 9.9/.39 1492B-5 6 x 48 x 59 (2.4 x 1.9 x 2.2 ) 178/ 7 /.47 149/ 5.9 9.9/.39 1492B- 114 x 48 x 59 (4.5 x 1.9 x 2.2 ) 41/ 15.8 2/.79 2/ 7.9 14/.55 1492B-15 Measurements are mm/inch. All models furnished with post clamp and indicator mounting clamp. Style 1492B- has fine adjustment on post clamp. Transfer Stand 23 Fine adjustment conveniently located in base. Three-point base pads improve accuracy. Contoured shape facilitates movement. Use with any Testmaster Indicator - stud accommodates Swivel Clamp (CP-2199). EHE-248 Gage head requires a CP-116 Clamp. Indicator not included. Base Dimensions Column Maximum Reach Mounting Order no. W x L x H (dia. x H) vertical (base to stud capacity contact point) dia. mm (inch) mm/inch mm/inch mm/inch mm/inch 76 x 1 x 45 (3 x 4.375 x 1.75 ) 25 x 43/.995 x 17 457/ 18 approx. 86/ 3.375 5.55/.218 23
- 4-12 MarTest. Touch Probes Digital 3D-Touch Probe 82 EW IP65 3D Application Can be used on milling and EDM machines to determine the zero position on a work piece determine the center of a bore determine and correct the position of a work piece and for measurement of lengths depths Features High accuracy and linearity - suitable for measuring work pieces - measurement over the entire working range is possible Can be controlled independently of a machine tool Easy to read display due to the combination of: - a progressive analog display (bar graph) for dynamic path information - a digital display for accurate reading Large working range (6 mm) in all axis (X, Y, Z) prevents damage to the stylus by contacting errors Shock and water proof; ideal for the use on a machine with a tool changer Compact metal housing and long probe arm Technical Data Working range Repeatability Resolution Display Mounting Order no. X, Y, Z-Axis in zero position of digital range shaft dia.* unidirectional display 82 EW -2 to 4 mm ±.5 mm.5 mm ± 2 mm 16 mm 4343 82 EWZ.787 to.157 ±.1.1 ±.787 3/4 43435 * Further mounting shafts are available on request Accessories Styli dia. d mm l mm Order no. 82 EWt 4 31 43432 ød ø12 ø16h5 52 82 4 l ø4 65 31 19 39
+ MarTest. Touch Probes 4-13 Digital 3D-Touch Probe 82 EW Application examples Determine the zero point of a work piece 1 Position the probe along the X-axis until it makes contact with the work piece and the display reads. 2 Set the display of the machine (X-Axis) to. Proceed with both Y- and Z-Axis in accordance to X-Axis. The position of the edge of the work piece to the machine is accurately determined. Determine the center of a bore: 1 Place the probe in the bore and proceed along the X-Axis until it makes contact with the work piece and the display shows. 2 Set the display of the machine (X-Axis) to. 3 The probe must proceed along the X-Axis in the opposite direction until it makes contact with the work piece and the display shows. 4 Read off the displayed value of the controller (X-Axis) e.g. 15.24 mm and proceed along X-Axis at half the displayed value 7.512 mm and set the display of the machine (X-Axis) to. Proceed with Y-Axis in the same manner The position of the center of the bore to the machine is exactly determined. To determine and correct an alignment of a work piece 1 The probe must proceed along the Y-Axis until it makes contact with the work piece and the display shows. 2 Set the displayed value of the machine for both X-and-Y-Axis to. 3 The probe must proceed along the X-Axis, e.g. for 2 mm (dx) 4 The probe must proceed along the Y-Axis until it touches the work piece and the display shows. 5 Read off the displayed value of the machine (Y-Axis) e.g..48 mm (dy) 6 Determine the correction angle. Angle= arctan dy/dx = 3 and realign the work piece accordingly The alignment of the work piece is now correct. Length measurement 1 The probe must proceed along the X-Axis until it makes contact with the work piece and the display of the probe shows. 2 Set the display of the machine (X-Axis) to. 3 Make contact with the edge of the work piece and proceed along the X-Axis until the display of the probe shows. 4 Read off the determined length shown in the display (X-Axis) of the machine tool.
- 4-14 MarTest. Touch Probes Mechanical 3D-Touch Probe 82 W 3D Application IP65 Can be used on milling and EDM machines to determine the zero position on a work piece determine the center of a bore determine and correct the position of a work piece and for measurement of lengths depths Features High accuracy and linearity - suitable for measuring work pieces - measurement over the entire working range is possible Can be controlled independently of a machine tool Easy to read display Large working range in all axis (X, Y, Z) prevents damage to the stylus by contacting errors Shock and Water proof, ideal for the use on a machine with a tool changer Compact metal housing and long probe arm Technical Data Repeatability Readings Dial Mounting Order no. in zero position dia. shaft dia. unidirectional 82W ±.1 mm.1 mm 5 mm 16 mm 4343 82 WZ ±.4.1 2. 3/4 434315 48 22 57 ø16h5 Accessories Styli dia. d mm l mm Working range Order no. x,y (mm) z (mm) 82Wts 4 44.8 7.5 43433 82Wtk 3 32.6 13 7.5 434331 82Wtl 6 71.1 19 7.5 434332 ød 4 8 119 l ø4
+ MarTest. Touch Probes 4-15 Mechanical 3D-Touch Probe 82 W Application examples Radial approach: black scale 1. The probe makes contact with the work piece; the difference between the spindle axis and the work piece edge can be read off (for example: -.44 mm). 2. The Zero position has be reached, spindle axis=work piece edge: The NC control can be set to.. Axial approach: red scale 1. The probe makes contact with surface, the difference value can be read (for example:.8 mm). 2. Zero position has been reached. The effective total length of the probe has been preset. The NC. control can be set to..