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. Type–UM spanner wrench
ER16/ER20/ER25/ER32/ER40/ER50UM
| Collet Chuck Wrench | ||||
| Shape | Model | L | D | Weight |
| UM | ER25 | 218mm | 37mm | 215g |
| ER32 | 253mm | 45mm | 359g | |
| ER40 | 277mm | 85mm | 431g | |
2. Type–A spanner tool
ER8/ER11/ER16/ER20/ER25A
| Collet Chuck Wrench | ||||
| Shape | Model | L | D | Weight |
| A | ER8A | 116mm | 12mm | 64g |
| ER11A | 116mm | 17mm | 78g | |
| ER16A | 1 52mm | 25mm | 125g | |
| ER20A | 166mm | 31 mm | 154g | |
3. Type-M collect wrench
ER8M/ER11M/ER16M/ER20M/ER25M
| Collet Chuck Wrench | ||||
| Shape | Model | L | D | Weight |
| M | ER8M | 78mm | 5.5mm | 22g |
| ER11M | 97mm | 7.5mm | 37g | |
| ER16M | 122mm | 13mm | 72g | |
| ER20M | 132mm | 17mm | 84g | |
| ER25M | 140mm | 20mm | 114g | |
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 | ||||
| Shape | Model | L | D | Weight |
| C | C32 | 265mm | 60mm | 282g |
| C42 | 320mm | 79mm | 553g | |
| SC | 38-42 | 171mm | 33mm | 90g |
| 45-52 | 180mm | 39mm | 102g | |
| 55-62 | 230mm | 48mm | 129g | |
| 68-72 | 239mm | 51mm | 234g | |
| 78-85 | 270mm | 64mm | 279g | |
| APU | APU | 205mm | 46mm | 111g |
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.
