Specification AgeRangeDescription : adult Brand : DISIROU BulletPoint1 : A set contains 2pcs angle plates. BulletPoint2 : Angle range: +/-10'. BulletPoint3 : Size: 3"x3"x1/4"(45degree, 45degree, 90degree), 1pc, 2"x3-3/8"x1/4"((30degree, 60degree, 90degree),1pc BulletPoint4 : Hardened: HRC52-58. BulletPoint5 : for machinists, woodworkers, metalworkers, and more Color : Sliver ExternallyAssignedProductIdentifier : 7505700061823 ItemName : DISIROU Gauge Block Set, Setup Blocks, 2Pcs 30/45/60/90 Degree Precision Machinist Measurement Tool Angle Block Ruler, Inch Metric Triangle Metal Block Angle for Router and Table Saw ItemPackageDimensions_Height : 1 centimeters ItemPackageDimensions_Length : 3 centimeters ItemPackageDimensions_Width : 2 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : gage-blocks Manufacturer : DISIROU ModelName : 32615077757 ModelNumber : 32615077757 NumberOfBoxes : 1 NumberOfItems : 1 PartNumber : 32615077757 ProductDescription : About gauge blocks’ history: Gauge blocks were invented in 1896 by the Swedish mechanic Carl Edvard Johansson. They are used as a reference for calibrating measuring devices used in machine shops, such as micrometers, sine bars, calipers and micrometers (when used for inspection). Gauge blocks are the main means of standardising lengths used in industry.
Tips when you use them: To use them, the blocks are removed from the set, cleaned of their protective coating (petroleum jelly or oil) and screwed together to form a stack of the desired size. The blocks are calibrated accurately at 20 °C (68 °F) and should be kept at this temperature when measuring. This mitigates the effects of thermal expansion. Wear-resistant blocks, made of a harder substance such as tungsten carbide, are mounted at the ends of the stack wherever possible to protect the gauge block from damage during use. ProductSiteLaunchDate : 2024-09-19T03:26:45.183Z Size : 2PCS UnitCount : 1 UnspscCode : 52140000