Steel DELscrew's material is using Free-cutting steel.
(the equivalent SUM24L with JIS) JIS is Japanese Industrial Standards.
Click here for more information of Free-cutting steel.
Refer to the diameter size of Steel DELscrew series below.
M1, M1.2, M1.4, M1.6, M1.7, M2, M2.3, M2.5
M1.7 and M2.3 are included in the old JIS standards.
Steel DELscrew has kinds of different length such as the following.
1.0mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm
2.0mm, 2.5mm, 3.0mm, 4.0mm, 5.0mm, 6.0mm
DELscrew is the most short and smallest set screws, which are little far beyond category of ISO standard.
Length dimensional tolerance, up to 2mm is set plus or minus 0.05mm, and dimensional control.
Length from 2.0mm to 6.0mm within ISO standards, the tolerance is set +0/-0.2mm (or +0/-0.3mm).
Steel DELscrew available from stock is zinc plated set screw,
a plating thickness within 0.003mm to 0.005mm and has two colors Black trivalent and White trivalent in compliance to RoHS.
Material Stainless steel we use is the equivalent SUS303 with JIS.
JIS is Japanese Industrial Standards.
Click here for more information of Stainless steel.
Refer to the diameter size of Stainless steel DELscrew series below.
M1, M1.2, M1.4, M1.6, M1.7, M2, M2.5, M3
M1.7 is included in the Old JIS standards.
Stainless steel DELscrew has kinds of different length such as the following.
1.0mm, 1.2mm, 1.5mm, 1.8mm
2.0mm, 2.5mm, 3.0mm, 3.5mm, 4.0mm, 5.0mm, 6.0mm
SAIDA specific standard set up to length 2.0mm, the tolerance of plus or minus 0.05mm, and dimensional control.
Length from 2.0mm to 4.0mm within ISO standards, the tolerance is set +0/-0.2mm (or +0/-0.3mm).
Which in case of 3.5mm, is not listed in ISO.
Generally, small diameter of the hexagon socket set screws, if it is tightened strongly in the hexagonal bar spanner, hexagonal hole is cracked.
Our hexagon socket set screws is using the Nickel Chrome Molybdenum Steel (SNCM240) to the material. And furthermore, the precision of the hexagonal hole is good.
Click here for more information of Nickel Chrome Molybdenum Steel.
In addition, the hardness by the heat treatment is high (HRC50 ~ 53), there is also toughness. Therefore, the hexagonal hole is not broken even if you tighten it until you can wrench off a hexagonal bar spanner.
At that time, when you move the magnet to the hexagonal hole, because it does not have a hexagonal hole deformed, broken hexagonal bar spanner is attracted to the magnet, it will be drawn from the hexagonal hole.
Our hexagon socket set screw dries surface rust prevention oil with a vacuum hot-air drier after black oxide finish (surface treatment).
Therefore, the hand of the assembling worker does not get oil at the time of work. In addition, this setscrews is easy to use in automated assembly, and it is hard to rust.