ER OZ EOC GER SK Type Collet Clamping Nut for CNC Milling Chuck Holder
These collet nuts are for tool holders and spindles collets clamping. There are several types ER, SYOZ, EOC, GER, SK, etc. They are standard sizes.
Clamping Nuts Feature:
• The tool holder nuts are made of high-quality chromium-molybdenum steel with hardness
between HRC 46 and 52 degrees and accuracy within 0.005 mm.
• After hardening, the finished thread of the roughing truck is rust-proof on the surface, with exquisite appearance and durability.
• High Precision Clamping Nut The concentricity and precision of nuts are high, which meets the higher requirements of processed products.
• The machine tool processing accuracy and tool life are improved.
• High precision, good wear resistance, stable performance, and reasonable price.
The commonly used ER types of tool holder nuts are:
ER-A type, ER-M type, ER-UM type, ER-B type.
A type | Outside | Pitch | M type | Outside | Pitch |
Diameter | of Thread | Diameter | of Thread | ||
ER8A | 12.0mm | M10*0.75 | ER8M | 12.0mm | M10*0.75 |
ER11A | 19.0mm | M14*0.75 | ER11M | 16.0mm | M13*0.75 |
ER16A | 28.0mm | M22*1.5 | ER16M | 22.0mm | M19*1.0 |
ER20A | 34.0mm | M25*1.5 | ER20M | 28.0mm | M24*1.0 |
UM type | Outside | Pitch | B type | Outside | Pitch |
Diameter | of Thread | Diameter | of Thread | ||
ER25 | 42.0mm | M32*1.5 | ER16B | 24.5mm | M19*1.0 |
ER32 | 50.0mm | M40*1.5 | ER20B | 34.0mm | M24*1.0 |
ER40 | 63.0mm | M50*1.5 |
OZ (EOC) clamping nut
Size | D(mm) | L(mm) | T |
EOC6 | 18 | 14 | M14X1 |
EOC8 | 26 | 19 | M20X1.5 |
EOC10 | 30 | 19 | M22X1.5 |
EOC12 | 35 | 20 | M27X1.5 |
EOC16 | 43 | 24 | M33X1.5 |
EOC20 | 50 | 28 | M42X2 |
EOC25 | 60 | 30 | M48X2 |
EOC32 | 72 | 33.5 | M60X2.5 |
EOC40 | 85 | 37 | M68X2.5 |
EOC50 | 100 | 43 | M80X2.5 |
GER clamping nut
Size | D | L | M |
GER16 | 30 | 24.7 | M22x1.5 |
GER20 | 35 | 25.5 | M26x1.5 |
GER25 | 40 | 25.9 | M32x1.5 |
GER32 | 48 | 26.6 | M40x1.5 |
SK clamping nut
Size | D | L | M |
SK06 | 20 | 21.3 | M15.5*1 |
SK10 | 28 | 24 | M21.5*1 |
SK16 | 40 | 31 | M32*1.5 |
SK25 | 55 | 37.5 | M45*1.5 |
Collet Nut Insertion Procedure:
1. Insert the collet at an angle, fitting the two extractor teeth which protrude A (figure 1) into the collet's groove (figure 2).
2. Place the two parts on a clean and horizontal work surface, press down with your thumb on the back end of the collet until it clicks into place (figure 3).
Extraction Procedure
1. Place the nut on your right hand, push the top of the collet with a middle finger towards the mark on a nut, to let A site of the nut completely insert the collet groove (figure 4). At the same time, the left hand tightly holds the nut, the thumb pulls the bottom of the collet at the mark direction (figure 5), to make one side of the collet out of the nut (figure 6).
2. Slightly rotating collet to remove it from the nut.
3. Please use a screwdriver instead if necessary (figure 7).
RicoCNC supplies a range of metalworking tool holders, collet, collet nut, toolholder forks spares, cnc spare parts, and toolings, etc.
Welcome to contact us if any inquires for CNC machine tools!
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