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What is the difference between Synchro Master collets? GH Type GHC Type
There are two types of synchro-master collets: GH type and GHC type, and there are differences in the corresponding refueling methods for each. Please use it properly depending on the refueling method and the tap you use.
Tap holder for machines with synchronous feed mechanism SynchroMaster
How to use a special collet
How to use a special collet
The synchro master collet has a square stop.
In order to correctly transmit the movement of rotation, please use a special collet for the Synchro Master.
| GH type (center-through*, for external lubrication) | GHC type (for collet through) | ||||
| general-purpose | Center-Thru | External lubrication | Emphasis on chip emissions | Collet Thru | |
 No groove |
 |
 |
 grooved |
 Even a tap without an oil hole improves chip discharge! |
|
| It is a general collet and can be used for both center-through and external lubrication. It is the most widely used and recommended first collet. | This collet is for collet thru to improve chip discharge. Compared to external lubrication, it achieves overwhelming chip discharge. | ||||
Colette selection table
(FAQID:12795)
| machine | Tapped oil hole | Collet |
| Internal lubrication (center-through) | existence | GH type* |
| Internal lubrication (collet through) | without | GHC Type |
| External lubrication | without | GH type |
* ER8GH does not support center thru
(FAQID:12795)