Dongguan Guotai Precision Instrument Co., Ltd. is a supplier of quality inspection instruments, tools, gauges, and maintenance services. Our main products include: Mitutoyo instruments from Japan, Swiss series quality inspection equipment, measuring instruments; projectors, tool microscopes, image measuring instruments, 3D measuring devices, magnifying glasses, SK desk magnifiers; tachometers, noise meters, illuminance meters, temperature and humidity gauges, and recorders; push-pull force gauges; torque measuring tools, calipers, micrometers, dial indicators, height gauges, various hardness testers, granite platforms, grid knives, gloss meters; color difference meters; standard light source boxes, various microscopes; infrared thermometers, needle gauges, thread gauges, ring gauges, molds, hardware and electronic accessories; cleanroom equipment, salt spray test machines, abrasion test machines, ion wind generators, and more.
Mitsubishi Hardness Tester Accessories Options
19BAA058: Vickers Diamond Tip (for HM-210 Series)
19BAA059: Vickers Diamond Tip (for HM-220 series)
19BAA061: Nuss Hardness Diamond Indenter (for HM-210 Series)
19BAA062: Nuss Hardness Diamond Indenter (for HM-220 Series)
19BAA001: Standard Hardness Block 100HMV
19BAA002: Standard Hardness Block 200 HMV
19BAA003: Standard Hardness Block 300HMV
19BAA004: Standard Hardness Block 400HMV
19BAA005: Standard Hardness Block 500HMV
19BAA006: Standard Hardness Block 600HMV
19BAA007: Standard Hardness Block 700 HMV
19BAA008: Standard Hardness Block 800HMV
19BAA009: Standard Hardness Block 900HMV
19BAA010: Standard Hardness Block 40HMV
810-017: Flat Nose Pliers (Opening Width 100mm)
810-013: Sample (Sheet) Support
810-014-01: slender sample holder (horizontal type)
810-015-01: slender sample holder (vertical type)
810-019: Sample Inclination Bracket
810-020: Sample Support Bracket
810-018: Rotating Worktable
810-084: Rotating Sample Holder
810-085: Adjustable Sample (Sheet Metal) Bracket
810-095: Rotating Inclined Specimen Platform
375-056: Calibration Scale (for CCD Camera Pixel Calculation)
810-650-1: Resin Inlaid Sample Platform ø5.4
810-650-2: Resin Inlaid Sample Stand ø0
810-650-3: Resin Inlaid Sample Platform ø1.75
810-650-4: Resin Inlaid Sample Platform ø8.1
810-650-5: Resin Inlaid Sample Platform ø0
02ATE760: Instrument Bench (for Testing Machines, PCs)
810-641: Vibration Damping Workbench (for Testing Machines)

Dongguan Entian Instrument Equipment Trading Department offers after-sales service with a technical team specializing in hardness tester repairs. We provide a range of maintenance, upgrades, and改造 services for various hardness gauges. For sale and repair: Mitutoyo Micro-Vickers hardness testers HM-101, HM-112, HM-122, HM-114, HM-124, HM-123, HM-113, HM-115. Also, Mitutoyo Rockwell hardness testers AR-10, ARK-600, ATK-600.
1. Maintenance: Various hardness tester models: Mitutoyo hardness testers from Japan, FT hardness machines from Japan,沃伯特hardness gauges from the USA, Chinese-made Rockwell hardness gauges, Surface Rockwell hardness gauges, Digital Rockwell hardness gauges, Vickers hardness gauges, Wyss hardness gauges, Lichtenberg hardness gauges, and Brinell hardness gauges, etc.
2. Various measuring tools such as: Japanese Mitutoyo calipers, Mitutoyo micrometers, altimeters, digital micrometers, tool microscopes, projectors, and image measuring instruments, etc.
3. Offer various instrument accessories, such as: hardness tester HRC tips, hardness tester standard blocks, hardness tester halogen bulbs, and projector bulbs, etc.
Our motto is: Top-quality products, advanced technology, reasonable prices, and sincere service!
All products repaired by our company are guaranteed for three months, excluding man-made factors, and warranty services are offered! Reasonable prices for wear and tear parts!

Rockwell Hardness Tester Testing Steps:
(1) Clean the top surface of the lead screw and the upper and lower ends of the worktable; place the worktable on the lead screw.
(2) Clean the specimen support surface and place it on the worktable. Rotate the handwheel to slowly lift the worktable and lift the press head until the small pointer points to the red dot and the large pointer has rotated three full circles vertically upwards.
(3) Rotate the indicator housing so that the long dividing line between C and B aligns with the pointer.
(4) Pull the loading handle to apply the main test force; the large pointer on the indicator will rotate counterclockwise.
(5) Once the pointer stops turning, push the unload handle back to release the main test force.
(6) Read the corresponding scale measurement from the indicator;
(7) Rotate the handwheel to lower the specimen, then move the specimen and proceed with a new test following steps (2) to (6).
(8) After testing, cover the machine with a dust cover.
Cautionary Notes
(1) Regularly apply a small amount of lubricating oil to the contact surface between the lead screw and the handwheel.
(2) Before using the hardness tester, clean the top surface of the lead screw and the upper surface of the worktable.
(3) Regularly check the hardness gauge accuracy using standard hardness blocks, and absolutely do not test on the supporting surface.
(4) When there are burrs on the standard hard block support surface, use an oil stone to smooth it. During testing at different positions, the hard block should be dragged on the worktable; it should not be lifted off the table.

Dongguan Guang Tai Co., Ltd. is capable of repairing various hardness gauges with significant price advantages. We can provide a repair service plan tailored to your needs, ensuring accuracy within the national standards range.
Maintain hardness tester:
Mitsubishi Sumitomo Micro-Vickers Hardness Testers HM-101, HM-112, HM-122, HM-114, HM-124, HM-123, HM-113, HM-115 for sale and repair; Mitsubishi Rockwell Hardness Testers AR-10, ARK-600, ATK-600 for sale and repair; Akashi Hardness Testers; MVK-H0, MVK-H1, MVK-H2, MVK-H3, MVK-H100, MVK-H200, MVK-H300, AR-10, AR-20, ATK-600, ARK-600, HR-521, HR-522, HM-101, HM-112, HM-113, ATK-F3000, ATK-F2000, ATK-F1000, ARK-F3000, ARK-F100 for sale and repair.
Japanese FUTURE-TFCH Hardness Gauge Repair, FT Rockwell Hardness Testers Repair FR-1eA, FR-3e, FR-1eL, FR-2e, FR-2eL, FR-3eL, LC-200R, LC-200R FV-700, FV-700e, FV-100e, FV-300e, FV-300, FM-100e, FM-100, FM-300e, FM-300, FM-700e, FM-700 FT
U.S.沃泊特Micro-Vickers Hardness Tester 401MVA, Vickers Hardness Tester 401MVD, Vickers Hardness Analysis Software, Manual Rockwell Hardness Tester 500RA, Electric Rockwell Hardness Tester 500MRA, Surface Rockwell Hardness Tester 500MRA/S, Digital Rockwell Hardness Tester 600MRD, Digital Surface Rockwell Hardness Tester 600MRD/S, 660RLD Series Digital Rockwell Hardness Testers
Japanese Akashi Hardness Meters: MVK-H0, MVK-H1, MVK-H2, MVK-H3, MVK-H100, MVK-H200, MVK-H300, AR-10, AR-20, ATK-600, ARK-600, HR-511, HR-521, HR-522, HM-101, HM-112, HM-113, ATK-F3000, ATK-F2000, ATK-F1000, ARK-F3000, ARK-F1000, ARK-F2000, MVK-H11, AVK-C1, AVK-C2, AVK-C0