Step Block
YUSHI Instruments: Leading Innovation in NDT Instruments
Yushi Instruments is a high-tech R&D-centered enterprise dedicated to providing high-quality ultrasonic testing (UT) equipment to the world. The company was founded in 1985 (formerly known as Shenyang Flaw Detection Machine Factory) and officially established in 2011. After more than a decade of dedicated innovation, we have grown to become a leader in China's non-destructive testing (NDT) industry. Our award-winning, multi-patented products such as the 2024 PM5 Gen2 and 2025 PM5 Gen3 Ultrasonic Thickness Gauge have received national patents and international certifications, fully reflecting our commitment to excellence.
YUSHI now has developed 8 categories of NDT products:
| Ultrasonic Thickness Gauge | Ultrasonic Flaw Detector |
| Ultrasonic Pulse Generator and Receiver | Coating Thickness Gauge |
| LEEB Hardness Tester | Industrial LED Film Viewer |
| Black and White Densitometer | UV NDT Lamp |
Our Best-Selling Step Block
In the world of Non-Destructive Testing (NDT), accuracy is not just a goal—it's a necessity for ensuring the safety and integrity of critical assets across aerospace, oil and gas, manufacturing, and construction industries. Ultrasonic testing is a cornerstone method for detecting internal flaws and measuring material thickness without causing damage. The foundation of any reliable ultrasonic inspection is a precise calibration block.
YUSHI calibration blocks are engineered to be that foundation. We provide a comprehensive range of flaw detector blocks and thickness gauge blocks, manufactured to the highest standards to reduce measurement errors and deliver consistent, trustworthy results. Our products serve as the essential reference that ensures your testing equipment performs optimally.
Step Block Specification
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Scale Value |
Dimension |
Material |
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Mm. |
In. |
Mm. |
In. |
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4-Step Block |
0.80mm/1.00mm/1.50mm/2.00mm 3.00mm/5.00mm/10.00mm/15.00mm 2.50mm/5.00mm/10.00mm/20.00mm 6.25mm/12.50mm/18.75mm/25.00mm 12.50mm/25.00mm/37.50mm/50.0mm 0.040"0.060"0.080"0.100" 0.100"0.200"0.400"0.600" 0.250"0.500"0.750"1.000" |
80.0mm*20.0mm 80.0mm*24.5mm 80.0mm*23.0mm 3.2"*0.8" |
1018Steel,304 Stainless Steel,6063Aluminum |
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5-Step Blcok |
0.50mm /1.00mm /1.50mm / 2.00mm / 2.50mm 1.00mm / 2.00mm / 3.00mm / 4.00mm / 5.00mm 2.50mm / 5.00mm / 7.50mm / 10.00mm / 12.50mm 5.00mm / 10.00mm / 15.00mm / 20.00mm / 25.00mm 0.010" 0.020" 0.030" 0.040" 0.050" 0.020" 0.040" 0.060" 0.080" 0.100" 0.050" 0.250" 0.500" 1.000" 2.000" 0.100" 0.250" 0.500" 0.750" 1.000" 0.100" 0.200" 0.300" 0.400" 0.500" 0.500" 0.750" 1.000" 1.500" 2.000" |
100.0 x 20.0mm 100.0 x 24.5mm 3.75" x 0.75" 4" x 0.8" 4" x 0.965" |
1018Steel,304 Stainless Steel,6Al4V |
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6-Step Block |
1.00mm / 3.00mm / 5.00mm / 10.00mm / 15.00mm / 20.00mm 2.50mm / 5.00mm / 10.00mm / 15.00mm / 20.00mm / 25.00mm |
120.0 x 20.0mm 120.0 x 24.5mm |
1018Steel,304 Stainless Steel |
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7-Step Block |
1mm/1.5mm/2mm/4mm/6mm/8mm/10mm 3mm/12mm/24mm/30mm/36mm/42mm/48mm |
140.0mm*20.0mm |
1018Steel,304 Stainless Steel |
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8-Step Block |
1.00mm / 2.00mm / 3.00mm / 4.00mm / 5.00mm / 6.00mm / 7.00mm / 8.00mm 0.030" 0.040" 0.050" 0.060" 0.070" 0.080" 0.090" 0.100" |
160.0 x 20.0mm 6.4" x 0.8 |
1018Steel |
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10-Step Block |
1.00mm / 2.00mm / 3.00mm / 4.00mm / 5.00mm / 6.00mm / 7.00mm / 8.00mm / 9.00mm / 10.00mm 2.00mm / 4.00mm / 6.00mm / 8.00mm / 10.00mm / 12.00mm / 14.00mm / 16.00mm / 18.00mm / 20.00mm 2.50mm / 5.00mm / 7.50mm / 10.00mm / 12.50mm / 15.00mm / 17.50mm / 20.00mm / 22.50mm / 25.00mm 0.050" 0.100" 0.150" 0.200" 0.250" 0.300" 0.350" 0.400" 0.450" 0.500" 0.100" 0.200" 0.300" 0.400" 0.500" 0.600" 0.700" 0.800" 0.900" 1.000" 1.100" 1.200" 1.300" 1.400" 1.500" 1.600" 1.700" 1.800" 1.900" 2.000" |
200.0 x20.0mm 7.5" x 0.75" 7.5" x 0.8" 8" x 0.8" |
1018Steel,304 Stainless Steel,7075Aluminum |
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Tipsy step Block |
25.00mm / 50.0mm / 75.0mm / 100.0mm 37.5mm / 62.5mm / 87.5mm / 112.5mm 1.0", 2.0", 3.0",4.0" 1.5", 2.5", 3.5",4.5" 25.00mm/50.0mm/75.0mm/100.0mm 1.000",2.000",3.000",4.000" |
Wide:1"(25.4mm) Include case |
1018Steel |
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Curved Surface Block |
2.50mm / 5.00mm / 10.00mm / 15.00mm / 20.00mm 0.100" 0.200" 0.300" 0.400" 0.500" |
120°Curved 5-Step Block Wide: 20.0mm'×120°α/ 0.8" ×120°α Internal diameter: 20.0mm/1" Length: 100.0mm/4" |
1018Steel,304Stainless Steel |
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Step Block Material
Steel Step Block
Obviously made from carbon steel, this step calibration block is very suitable for measuring steel materials with high accuracy. It can be made for various steps, including 4,5,6 and 10 steps.
Alloy Step Block
This calibration step block is made from alloys like alloy steels, nickel alloys, and refractory alloys. It is exceptionally accurate for measuring alloys with great accuracy.
Aluminum Step Block
Aluminum is employed in manufacturing this step calibration block, and it is employed with great accuracy for measuring aluminum materials.
Acrylic Step Block
Made from acrylic materials, this step calibration block is usually applicable where chemical resistance is needed.
Step blocks work by supporting and raising the height of the clamp. You can use either the bottom part of a step block or both parts of a step block. When using the bottom part, you'll need to place it against the back of the clamp. The back of the clamp will rest on the step block's teeth, thus stabilizing it.
You can use both parts of a step block to support a clamp. Using both the top and bottom parts will allow you to raise the clamp higher. Step blocks are self-locking. You can move the top part higher along the ridges of the bottom part. Raising the top part will create an elevated surface with which you can support the clamp. And if you need to lower the clamp, you can move the top part of the step block to a lower position on the bottom part.
Step Block Storage
Never leave step blocks sitting out. When not in use, place step blocks in their case with the lid closed. Doing this reduces the risk of accidental damage and keeps particles in the air from collecting on the block's surface. After use, move your step block case to a dry temperature-controlled environment.
Our Service
Warranty
1. Failure or damage caused by the product during the manufacturing process.
2. Normal use in accordance with the instructions for use, but the product malfunction or damage.
3. Damage or loss during transportation is the responsibility of the factory.
Out of the Warranty
1. Damage caused by exceeding the rated load capacity during operation.
2. Damage caused by user's own modification and wrong repair.
3. The damage caused by the user's use or selection of unqualified parts, oils and other products that do not meet the requirements of the product.
4. Belonging to the normal maintenance content, such as: cleaning, replacement of various filters; adjustment of brakes, clutches, engines and other parts that need to be adjusted.
5. Parts belonging to normal wear and tear.
6. Damage caused by other accidents or irresistible reasons.
Packaging and Shipping
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Packaging |
Plastic bags, paper boxes |
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Transportation methods |
Road transport, rail transport, sea transport, air transport |
Video
Our Certificate
FAQ
Q: What is the purpose of a step block?
A: Allowing the workpiece to move freely could result in damage. Rather than only using a clamp, though, you May want to use a step block. A step block will allow you to adjust the height of the clamp while stabilizing and securing the workpiece in place
Q: What are step blocks used for?
A: Step blocks are used to expand clamping kits. Step blocks act as abutments for clamping shoes and can be adjusted for height or also combined.
Q: What are step blocks?
A: Step blocks are block-shaped parts that are used in conjunction with a clamp to secure workpieces. They consist of two parts. As shown in the photo above, step blocks are essentially sliced diagonally to create two parts. They have a bottom triangle part and a top triangle part. When placed together, these two parts will form the step block.
We're well-known as one of the leading step block manufacturers and suppliers in China. Please feel free to buy high quality step block for sale here from our factory. Contact us for more details.
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