What are machinist 123 blocks used for?
Simply put, a 1-2-3 block is a common shop setup tool usually made of hardened steel that measures 1″ thick × 2″ wide × 3″ long. Machinists use the blocks for myriad machine and inspection setup tasks.
What size are the holes in a 123 block?
The standard tapped hole size of these G-123-BS, 4018, 4000, and 4028 models is 3/8-16 inches, which aids in most clamping operations.
What does a 123 block weigh?
These machinist 123 blocks with no holes are heavy-duty, long-lasting, and reliable. Weight: 3.5 lbs.
Why do parallels have holes?
Parallels commonly have a series of holes drilled on the ‘front’ face – allowing them to be used to position a workpiece or secured using t-slot clamps, and a countersink on each side to remove any sharp edges.
How do you clean 123 blocks?
From the site: “The formulation, based on a unique combination of solvents and waxes, is designed to penetrate metal pores and dissolve minor corrosion, then leave a resilient waxy coating that lasts for many months.” Clean the blocks with brake cleaner, spray with T-9, you shouldn’t have any issues.
What does 3 blocks mean?
A block is the distance on a street between one cross street and the next cross street. If you are ‘three blocks away’ from something, you are three of these (in the image) away.
What is the name of the parallel block?
Parallels are rectangular blocks of metal, commonly made from tool steel, stainless steel or cast iron, which have 2, 4 or 6 faces ground or lapped to a precise surface finish.
How are adjustable parallels used?
Its adjustable feature makes it possible to adjust it to exact size by micrometer measurement and also permits use in place of several solid-type parallels. The parallel is useful as a gage in checking the size of slots and openings.
What does 10 blocks away mean?
27 Sep 2019. A block is the distance on a street between one cross street and the next cross street. If you are ‘three blocks away’ from something, you are three of these (in the image) away.
How far is a block in USA?
A block is not really defined by distance, but rather is defined by the distance between cross streets, which could be 50 feet or 200 feet, depending on the place. Most blocks in cities tend to be between 200 – 300 feet apart, so the distance between 2 blocks would be roughly 400 – 600 feet.