Dozens of years of accumulated mechanical processing tips

In the machinery industry, it has been almost a few decades to climb the belt. There is a certain research on the craft. Although some things are small and inconspicuous, if we can get inspiration from it, we can give you a different idea, use our brains and find ways to The work is still very helpful. Send some small craftsmanship, I hope everyone will follow the post and make progress together.
Tuen Mun 1:
Remove the jaws of the vise, and machine two M4 threaded holes. Two steel plates 2 that are 1.5 mm thick with the jaws are riveted with aluminum countersunk rivets and hardened with a thickness of 0.8 mm. Fasten to the jaws with M4 countersunk screws 1 to form a durable soft jaw. This also protects the part from being pinched and interchangeable.
Tuen Mun II:
It is inconvenient to suck and take small parts (feet parts) with magnets
An iron plate 2 can be sucked under the magnet 1
Not only can you suck a lot of small pieces
Moreover, pulling the iron plate off the small piece will automatically dump it into the collection box immediately.
Not enough to be impressed but very practical
Tuen Mun three:
The pulley often slips between the pulley and the axle when the pulley is driven
Draw a series of nests on the axle with ¢15~18mm
This can form an adsorption force to prevent slippage
Turn waste into treasure boss will reward
Tuen Mun Four:
When the hex wrench 1 is short and can't be stressed, the tube with the inner diameter slightly larger than the wrench can be cut from a section.
Insert the wrench into the slot and use it as a long handle.
Tuen Mun Five:
Does it mean to tighten the workpiece: first position and then clamp, but what? I think that for a workpiece, the first clamping and repositioning, because the workpiece will be deformed when clamping, so it should be clamped and then positioned. For 6-point positioning, find the freedom to limit it.

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