HST Repairs CAPTO Clamping Systems

June 11, 2015

HST repairs CAPTO Clamping Systems with OEM componentsAt High Speed Technologies, Inc. we repair CAPTO Clamping Systems with OEM components. Our technicians have trained with CAPTO factory representatives. If you have a spindle with a damaged CAPTO clamping system call us at 1-603-483-0333

Coromant CAPTO clamping system was developed in the 1980s to provide a rigid simultaneous contact system.  It was well received in turning applications for automated tool change. But over the years it has found greater acceptance with milling application and it has become a standard for some major machine makers. It has also been an ISO standard since 2008.

CAPTO tool clamp system requires special tooling to disassemble and repair.  But with the correct tools and training, system repair is relatively straight forward. So if your CAPTO spindle needs rebuilding send it to HST and we will also restore your clamping system back to OEM specification.

We can also repair or re-manufacture damaged shafts. So if you have a spindle that has a damaged CAPTO tool interface give us a call. We can probably repair it.

What Are Some Advantages of CAPTO Tooling?

Coromant claims numerous advantages for their CAPTO system. Some of them include:

  • Balanced and concentric
  • Self-Centering
  • High Pressure coolant through-tool compatibility
  • Higher bending strength
  • Higher rigidity

We have not verified all of these claims. But comments on various machining forums show that many end users really like the CAPTO system.

Some Quotes from Pertinent Forums

“As someone who runs more capto tools than not, in all our machines, here’s my take on it. Capto’s strengths are rigidity, accuracy, repeatability and torque transmission. It’s greatest strength is rigidity.” [SIC]

“We use C5 on all but 2 of our lathes. The advantage for us is that we can have over 60 tools with known offsets. When the operator sets up a job, he loads the tools into the turret. The tool offsets are loaded by variables in the program. There is no need to build tools or touch them off.
This also allows us to run the same program on 4 different lathe models using the same tools. It really is a neat system.”

“We use Capto exclusively on our high volume steel production lathes. It is a very strong connection. The real advantages are in the repeatability, accuracy and speed at which tool changes can be made. Even with very tight tolerances, you can swap out all the tools in the lathe and have a good part on first cut. There are two sets of tooling for each lathe, no inserts are changed in the machine. You change inserts on the spare tooling while the machine is running then swap out with the capto system. It saves a lot of time.” [SIC]

HST Now Repairs CAPTO Clamping Systems

Now when your clamping system needs a rebuild HST can provide the same high quality repair as we provide in all of our spindle rebuilds. Sandvik, unlike some other OEMs wants their customers to have access to quality repair facilities. For that reason they provided HST with training and tooling. Additionally, HST can now purchase original equipment parts directly from Sandvik. Sandvik wins, HST wins, and most of all our customers win. No need to be over charged by an OEM.

Some Samples of Our Work

Job I-1302

This Mazak Integrex spindle came to us from Sydney, Australia.  The tool taper was in good condition. However, the spindle required a complete rebuild.  Some foreign material got in between the tool post locking rings and caused galling.

The tool clamp system was a Sandvik Coromant CAPTO clamping system. This was an older style with double flat wound springs. (Newer styles use gas springs).

The unit has two springs each about 152 mm free length. The two springs that came out were 141 mm or 11mm shorter; definitely time for replacement.

Other components also had indications of approaching the end of their serviceable life and were replaced.

capto integrex springs replaced

Both main springs were replaced. The stationary and rotating locking rings on a CAPTO Integrex.

Sandvik factory rep training HST techs on the nuances of CAPTO clamping systems. A Mazak Integrex with CAPTO clamping ready to ship. A special thanks goes out to Luke L. at Southerland Engineering in Kirrawee, Australia for letting us use their Mazak Integrex ML II for our CAPTO training.

Sandvik factory rep training HST techs on the nuances of CAPTO clamping systems. A Mazak Integrex with CAPTO clamping ready to ship.
A special thanks goes out to Luke L. at Southerland Engineering in Kirrawee, Australia for letting us use their Mazak Integrex ML II for our CAPTO training.

At HST we repair CAPTO clamping systems to OEM specifications. If you have a damaged spindle and need emergency repair call us at 1-603-483-0333 or email us at [email protected].


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HST repairs CAPTO Clamping Systems with OEM componentsAt High Speed Technologies, Inc. we repair CAPTO Clamping Systems with OEM components. Our technicians have trained with CAPTO factory representatives. If you have a spindle with a damaged CAPTO clamping system call us at 1-603-483-0333

Coromant CAPTO clamping system was developed in the 1980s to provide a rigid simultaneous contact system.  It was well received in turning applications for automated tool change. But over the years it has found greater acceptance with milling application and it has become a standard for some major machine makers. It has also been an ISO standard since 2008.

CAPTO tool clamp system requires special tooling to disassemble and repair.  But with the correct tools and training, system repair is relatively straight forward. So if your CAPTO spindle needs rebuilding send it to HST and we will also restore your clamping system back to OEM specification.

We can also repair or re-manufacture damaged shafts. So if you have a spindle that has a damaged CAPTO tool interface give us a call. We can probably repair it.

What Are Some Advantages of CAPTO Tooling?

Coromant claims numerous advantages for their CAPTO system. Some of them include:

  • Balanced and concentric
  • Self-Centering
  • High Pressure coolant through-tool compatibility
  • Higher bending strength
  • Higher rigidity

We have not verified all of these claims. But comments on various machining forums show that many end users really like the CAPTO system.

Some Quotes from Pertinent Forums

“As someone who runs more capto tools than not, in all our machines, here’s my take on it. Capto’s strengths are rigidity, accuracy, repeatability and torque transmission. It’s greatest strength is rigidity.” [SIC]

“We use C5 on all but 2 of our lathes. The advantage for us is that we can have over 60 tools with known offsets. When the operator sets up a job, he loads the tools into the turret. The tool offsets are loaded by variables in the program. There is no need to build tools or touch them off.
This also allows us to run the same program on 4 different lathe models using the same tools. It really is a neat system.”

“We use Capto exclusively on our high volume steel production lathes. It is a very strong connection. The real advantages are in the repeatability, accuracy and speed at which tool changes can be made. Even with very tight tolerances, you can swap out all the tools in the lathe and have a good part on first cut. There are two sets of tooling for each lathe, no inserts are changed in the machine. You change inserts on the spare tooling while the machine is running then swap out with the capto system. It saves a lot of time.” [SIC]

HST Now Repairs CAPTO Clamping Systems

Now when your clamping system needs a rebuild HST can provide the same high quality repair as we provide in all of our spindle rebuilds. Sandvik, unlike some other OEMs wants their customers to have access to quality repair facilities. For that reason they provided HST with training and tooling. Additionally, HST can now purchase original equipment parts directly from Sandvik. Sandvik wins, HST wins, and most of all our customers win. No need to be over charged by an OEM.

Some Samples of Our Work

Job I-1302

This Mazak Integrex spindle came to us from Sydney, Australia.  The tool taper was in good condition. However, the spindle required a complete rebuild.  Some foreign material got in between the tool post locking rings and caused galling.

The tool clamp system was a Sandvik Coromant CAPTO clamping system. This was an older style with double flat wound springs. (Newer styles use gas springs).

The unit has two springs each about 152 mm free length. The two springs that came out were 141 mm or 11mm shorter; definitely time for replacement.

Other components also had indications of approaching the end of their serviceable life and were replaced.

capto integrex springs replaced

Both main springs were replaced. The stationary and rotating locking rings on a CAPTO Integrex.

Sandvik factory rep training HST techs on the nuances of CAPTO clamping systems. A Mazak Integrex with CAPTO clamping ready to ship. A special thanks goes out to Luke L. at Southerland Engineering in Kirrawee, Australia for letting us use their Mazak Integrex ML II for our CAPTO training.

Sandvik factory rep training HST techs on the nuances of CAPTO clamping systems. A Mazak Integrex with CAPTO clamping ready to ship.
A special thanks goes out to Luke L. at Southerland Engineering in Kirrawee, Australia for letting us use their Mazak Integrex ML II for our CAPTO training.

At HST we repair CAPTO clamping systems to OEM specifications. If you have a damaged spindle and need emergency repair call us at 1-603-483-0333 or email us at [email protected].


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