ISO SIDELOCK HOLDER
ISO SIDELOCK HOLDER
Cargo Carbide ISO Sidelock Holder is a dedicated CNC tool holder for securing compatible Weldon-shank milling cutters on machining centers with an ISO spindle interface. The holder uses a side-locking screw that engages the Weldon flat of the cutting tool, creating a direct mechanical connection between the holder and the cutter.
This type of holder is particularly suitable for milling tools manufactured with a Weldon flat. Common applications include end milling, slotting, pocketing, roughing, profiling and other CNC machining operations where a positive side-locking arrangement is required.
Unlike an ISO ER Collet Chuck, which uses an interchangeable collet and nut to grip cylindrical shanks, an ISO Sidelock Holder has a dedicated tool bore and locking-screw arrangement. This makes the holder especially relevant when the selected cutter is designed for Weldon-style side locking.
Industry ISO/DIN side-lock holders are commonly produced for Weldon tools according to standards such as DIN 1835 Form B and DIN 6535 HB. Available configurations can include ISO40 and ISO50 machine interfaces with different tool diameters and gauge lengths.
The correct holder should be selected according to the CNC machine's ISO taper, cutter shank diameter, Weldon flat specification, gauge length and machining requirements.
Product Specifications
| Specification | Details |
|---|---|
| Brand | Cargo Carbide |
| Product Name | ISO Sidelock Holder |
| Product Type | Side Lock / Weldon End Mill Holder |
| Machine Interface | ISO Taper |
| Tool Interface | Weldon / Side-Lock Shank |
| Main Application | CNC Milling |
| Tool Type | Compatible Weldon-shank milling cutters |
| Typical Tools | Solid Carbide End Mills, Milling Cutters |
| Machine Type | CNC Machining Center / VMC |
| Common Industry Sizes | ISO30, ISO40, ISO50 |
| Tool Diameter | Model dependent |
| Clamping Method | Side Locking Screw |
| Gauge Length | Model dependent |
| Tool Standard | Compatible Weldon shank |
| Selection Factors | ISO size, tool diameter, Weldon flat, length and coolant |
Typical Industry Configurations
| ISO Taper | Tool Diameter | Example Gauge Length |
|---|---|---|
| ISO30 | 6 mm | 50 mm |
| ISO30 | 8 mm | 50 mm |
| ISO30 | 10 mm | 50 mm |
| ISO30 | 12 mm | 50 mm |
| ISO40 | 6 mm | 50 mm |
| ISO40 | 8 mm | 50 mm |
| ISO40 | 10 mm | 50 mm |
| ISO40 | 12 mm | 50–60 mm |
| ISO40 | 16 mm | 63–70 mm |
| ISO40 | 20 mm | 63–70 mm |
| ISO40 | 25 mm | 80–100 mm |
| ISO40 | 32 mm | 80–100 mm |
| ISO50 | 16 mm | 63 mm |
| ISO50 | 20 mm | 63–80 mm |
| ISO50 | 25 mm | 80–100 mm |
| ISO50 | 32 mm | 100 mm |
| ISO50 | 40 mm | 100 mm |
ISO Sidelock Holder Applications
- CNC end milling
- Slot milling
- Pocket milling
- Shoulder milling
- Profile machining
- Rough milling
- Heavy material removal
- Die and mould machining
- Automotive component machining
- General engineering
- Production machining
- VMC milling
- CNC machining-center operations
- Solid carbide end mill holding
- Weldon-shank cutter holding
Key Benefits
1. Positive Side-Lock Clamping
The locking screw engages the Weldon flat of a compatible cutter, providing a positive mechanical tool-retention method.
2. Designed for Weldon Tools
The holder is specifically intended for cutters with a suitable Weldon flat rather than relying on an ER collet system.
3. Direct ISO Machine Interface
The ISO taper provides the connection between the CNC machine spindle and the side-lock tool holder.
4. Suitable for Milling Applications
The holder can be used for slotting, profiling, pocketing, shoulder milling and material-removal operations with compatible cutters.
5. Simple Tool Installation
The side-lock arrangement provides a straightforward method of securing a Weldon-shank cutter.
6. Multiple Tool Diameters
Industry ranges demonstrate side-lock holders for several cutter diameters, from small end mills through larger milling tools.
7. Suitable for Production Tooling
Dedicated side-lock holders can be useful in production environments where particular Weldon-shank cutters are repeatedly used.
Why Use an ISO Sidelock Holder?
An ISO Sidelock Holder is useful when the selected cutting tool has a Weldon flat and the CNC machine uses an ISO spindle interface.
ISO Sidelock Holder vs ISO ER Collet Chuck
| Feature | ISO Sidelock Holder | ISO ER Collet Chuck |
|---|---|---|
| Tool clamping | Side-lock screw | ER collet and nut |
| Main tool type | Weldon-shank tool | Cylindrical-shank tool |
| Tool-size flexibility | Dedicated bore | Multiple sizes with ER collets |
| Typical tool | Weldon end mill | End mill, drill, reamer |
| Setup | Direct side locking | Collet-based |
| Main application | Milling | Milling, drilling and general tool holding |
ISO Sidelock Holder vs ISO Facemill Holder
| Feature | ISO Sidelock Holder | ISO Facemill Holder |
|---|---|---|
| Main cutter | Weldon end mill | Face mill |
| Clamping method | Side-lock screw | Face-mill mounting |
| Primary operation | End milling | Face milling |
| Typical machining | Slotting, profiling, pocketing | Surface machining |
| Tool selection | Shank diameter + Weldon flat | Face-mill mounting specification |
How to Select the Correct ISO Sidelock Holder
1. Identify the Machine Taper
Check whether the machine uses ISO30, ISO40, ISO50 or another compatible taper.
2. Measure the Tool Shank
The holder bore must match the diameter of the Weldon-shank cutter.
3. Confirm the Weldon Flat
The cutting tool should have the appropriate flat for the side-lock screw.
4. Select the Gauge Length
Choose the holder length according to workpiece access, machine clearance and required tool projection.
5. Check the Locking Screw
The locking screw must be suitable for the holder and tool diameter. Larger holder bores may use different locking-screw arrangements. Industry examples show some larger Weldon holders using two locking screws.
6. Consider Coolant
If internal or peripheral coolant is required, confirm that the specific holder configuration supports the intended coolant arrangement. Some industrial Weldon holders are offered with coolant ducts or through-tool coolant capability.
7. Match the Complete Setup
Check:
Machine taper → ISO size → holder bore → cutter shank → Weldon flat → gauge length → coolant requirement
ISO Sidelock Holder for Carbide End Mills
Solid carbide end mills with suitable Weldon shanks can be mounted in compatible ISO side-lock holders.
For roughing and material-removal applications, a Weldon side-lock arrangement can be useful when the tool is specifically manufactured for this type of holder.
The final machining performance depends on the cutter geometry, carbide grade, workpiece material, machine rigidity, spindle parameters, feed rate and depth of cut.
ISO Sidelock Holder for CNC Milling
The holder can be incorporated into CNC milling setups for:
- Steel machining
- Stainless steel machining
- Cast iron machining
- Aluminium machining with suitable cutters
- Die and mould components
- Automotive parts
- General engineering components
- Production machining
The cutter and cutting parameters should always be selected according to the workpiece material and machining operation.
Important Tool Selection Note
An ISO Sidelock Holder should not be selected only by the machine taper.
For example, an ISO40 × 20 mm side-lock holder and an ISO40 × 32 mm side-lock holder have the same machine-side taper but are designed for different tool shank diameters.
FAQs
1. What is an ISO Sidelock Holder?
An ISO Sidelock Holder is a CNC tool holder designed to secure a compatible Weldon-shank milling cutter using a side-locking screw. It connects to a CNC machine through an ISO spindle taper.
2. What type of end mill can be used in an ISO Sidelock Holder?
The holder is intended for compatible Weldon-shank end mills and milling cutters. The cutter shank diameter must match the holder bore and the tool must have the appropriate Weldon flat.
3. What is the difference between an ISO Sidelock Holder and an ISO ER Collet Chuck?
An ISO Sidelock Holder uses a locking screw against a Weldon flat, while an ISO ER Collet Chuck grips cylindrical shanks using an ER collet and nut. The correct choice depends on the cutter shank design.
4. Which ISO sizes are commonly available?
Industry side-lock tooling is commonly available in ISO30, ISO40 and ISO50 configurations, with different tool diameters and gauge lengths. Exact availability varies by manufacturer.
5. How do I choose the right ISO Sidelock Holder?
Match the holder's ISO taper to the machine, then select the bore diameter according to the Weldon tool shank. Also verify the required gauge length, locking-screw arrangement and coolant requirements.
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