KORRETTO · Lathe center series
Live Center with Interchangeable Inserts
Live centers with interchangeable inserts use a replaceable insert structure to support different center hole forms and workpiece conditions. They are suitable for turning setups that require one live center body with multiple insert options.
Send the Morse taper, workpiece type, center hole form, insert requirement and support load, and we will help check whether this interchangeable-insert live center series fits your setup.
Product Overview
The C091 live center supports shafts through a replaceable tip. Its body stays in the tailstock while the tip rotates with the workpiece. The body table covers MT2 to MT5. The separate insert table lists the tip shapes and sizes for each body group.
How an Interchangeable-Insert Live Center Works
The Morse-taper body is held in the tailstock while the center spindle rotates on internal bearings with the workpiece. A replaceable insert forms the contact point between the rotating spindle and the workpiece center hole. Changing the insert changes the point geometry or support form without replacing the complete center body; the selected insert must seat securely and match the workpiece end form because it transfers both tailstock thrust and machining reaction into the spindle and bearings.
Typical Applications
- Workpieces with different center hole forms
- Turning setups requiring replaceable center tips
- Flexible tailstock support applications
- Multi-application shaft machining
- Applications where one live center body needs several insert options
Key Features
Interchangeable insert structure
One live center body can work with different insert forms
Suitable for flexible tailstock support
Helps reduce the need for multiple dedicated live centers
Supports different workpiece center hole requirements
Parameters and Dimensions
Use the dimension drawing and parameter table below to verify taper size, dimensions and key support parameters before model selection.
| Order No. | Model | D (mm) | D1 Outside Diameter (mm) | D2 Nose Diameter (mm) | L1 (mm) | L (mm) | Max. RPM | Accuracy (mm) | Net Weight (kg) |
|---|---|---|---|---|---|---|---|---|---|
| C091010 | MT2 | 17.78 | 48 | 22 | 69 | 138 | 4500 | 0.005 | - |
| C091110 | MT3 | 23.83 | 54 | 28 | 77 | 163 | 3500 | 0.005 | - |
| C091210 | MT4 | 31.27 | 63 | 31 | 89.5 | 197.5 | 3500 | 0.005 | - |
| C091310 | MT5 | 44.4 | 82 | 40 | 106.5 | 242.5 | 3000 | 0.005 | - |
| Applicable Model | Type | D (mm) | d (mm) | L (mm) | Tip Angle |
|---|---|---|---|---|---|
| MT2/MT3 | A | 12.75 | - | - | 60° |
| MT2/MT3 | B | 12.75 | 10 | - | 60° |
| MT2/MT3 | C | 12.75 | 8 | - | 60° |
| MT2/MT3 | D | 12.75 | 6 | - | 60° |
| MT2/MT3 | E | 12.75 | 10 | - | 60° |
| MT2/MT3 | F | 34 | - | - | 70° |
| MT4/MT5 | A | 15.7 | - | - | 60° |
| MT4/MT5 | B | 15.7 | 12 | - | 60° |
| MT4/MT5 | C | 15.7 | 10 | - | 60° |
| MT4/MT5 | D | 15.7 | 8 | - | 60° |
| MT4/MT5 | E | 15.7 | 12 | - | 60° |
| MT4/MT5 | F | 40 | - | - | 70° |
Image Gallery
Selection Notes
Choose the body from the tailstock Morse taper first. Then use the insert table for that body: MT2/MT3 and MT4/MT5 use different insert groups. The insert connection is listed as taper 1:7.5.
Match the tip angle and contact shape to the center hole. A long or recessed workpiece end may need a different tip form from a short, open shaft end. Check that the chosen tip reaches the support surface without the center body touching the part.
Changing the tip changes the contact geometry. Keep the body and insert seating surfaces clean, seat the insert securely, and use the speed listed for the selected body. For a fixed tip, compare the medium-duty live center.
When an Interchangeable-Insert Live Center Is Not Suitable
Do not use the center when the insert geometry does not match the center hole or workpiece end form, when the insert cannot be fully seated and secured, or when the selected body exceeds its listed speed or load condition. A fixed-point heavy-duty center may be more appropriate where maximum rigidity under severe cutting load is the primary requirement. Inspect and clean both mating surfaces after an insert change; chips, damage or incomplete seating can affect alignment and support stability.
FAQ
What is a live center with interchangeable inserts used for?
It is used when one live center body needs to work with different point shapes or support forms. The interchangeable insert structure allows the center to be adapted to different workpiece support requirements.
Is it a live center or a dead center?
It is a live center. The center rotates with the workpiece, and the point or insert can be changed according to the application.
What machine taper should be confirmed?
Please confirm the tailstock taper or machine interface before selection. The center body must match the machine taper correctly.
What insert or point type should be checked?
Please confirm the required point shape, workpiece center-hole form and support condition. The insert type should be selected according to the workpiece end form and machining requirement.
What speed or load should be considered?
Please confirm the operating speed, support load and point type used in the process. The center body and interchangeable insert combination must match the application conditions.
How is it different from a fixed-point live center?
A fixed-point live center uses one built-in point shape. An interchangeable insert live center allows the point style to be changed, which is useful for multiple workpiece support conditions.
What should be checked before installation?
Check the machine taper, insert type, locking condition, center-hole form and support alignment before installation. The insert and body contact surfaces should be clean and securely fitted.
What information is needed for quotation?
Please provide the machine taper, required insert type, workpiece drawing, support load, speed range and machining process.
