6 Types of Collet Spanner Wrench for CNC Tool Collection

There is a wide range of spanner wrenches on the market, but what are the wrenches suitable for CNC engraving machines, CNC machine tools, CNC routers, CNC drilling bits, CNC milling cutters, and CNC milling machines? When talking about spanner tools for CNC machines, we have to mention ER clamping system and collet nut. Usually, the type of spanner wrench is exactly matched to the collet stud, and then it is unified with the corresponding clamping system.

In 1972, REGO-FIXAG revolutionized the tool holding industry with the invention of the ER clamping system. It became a DIN standard (DIN 6499) in 1993.  The most important feature of the ER collet system is that one size holder can hold an entire range of tools, and other types, such as heat-shrink holders can only hold one particular size of toll. Today, the ER collet system is the most widely used of all clamping systems due to its remarkable scalability and accuracy. This is why there are now so many wrench spanners available for the ER clamping system under the precise segmentation in the CNC industry, which are often referred to as collet wrench, ER wrench, and er collet wrench. Popular sizes include ER16, ER25 and ER32 collet wrenches.

According to the characteristics of CNC collect systems and different shapes & constructions for collet nuts, we can classify the collet wrenches as follows:

1. TypeUM spanner wrench

ER16/ER20/ER25/ER32/ER40/ER50UM

Collet Chuck Wrench
ShapeModelLDWeight
UMER25218mm37mm215g
ER32253mm45mm359g
ER40277mm85mm431g

 

2. TypeA spanner tool

ER8/ER11/ER16/ER20/ER25A

Collet Chuck Wrench
ShapeModelLDWeight
AER8A116mm12mm64g
ER11A116mm17mm78g
ER16A1 52mm25mm125g
ER20A166mm31 mm154g

 

3. Type-M collect wrench

ER8M/ER11M/ER16M/ER20M/ER25M

Collet Chuck Wrench
ShapeModelLDWeight
MER8M78mm5.5mm22g
ER11M97mm7.5mm37g
ER16M122mm13mm72g
ER20M132mm17mm84g
ER25M140mm20mm114g

4. Type-O collet wrench spanner

ER16/ER20/ER25/ER32/ER40

5. Type-M SER collet wrench

ER11MS/ER16MS/ER20MS

6. C/SC/APU spanner wrenches, we also called it as hook wrenches.

Commonly used specifications are:

  • ER25/ER32/ER40
  • C32/C42
  • SC 38-42、45-52、55-62、68-72、78-85、90-95、100-110、110-130
  • APU13/APU16
Collet Chuck Wrench
ShapeModelLDWeight
CC32265mm60mm282g
C42320mm79mm553g
SC38-42171mm33mm90g
45-52180mm39mm102g
55-62230mm48mm129g
68-72239mm51mm234g
78-85270mm64mm279g
APUAPU205mm46mm111g

Additionally, there are also OZ (OZ25/OZ32) and ISO(ISO20/ISO25) wrench spanner types on the market.

What are the features of these collet wrenches from RicoCNC.com?

  • Collet spanner wrenches are made from carbon steel, and itis good toughness and wear resistance. High frequency hardened and
  • Black oxidized treatment with high hardness and corrosion resistant.
  • Red rubber covered handle offers a comfortable hand feeling, ergonomically design and ensures optimal force-transmission.
  • Used to fasten or remove lathe clamping nuts on machine tools and machinery.5. The handle on the wrench has a designation number for easy identification and selection.

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