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Back to counterboring

BSF

Backspotfacing up to 2.3 x the bore diameter

  • Without rotating the workpiece
  • Standard range for bore diameter 6.5 mm – 21.0 mm
  • Reliable backspotfacing or counterboring
  • Blade activation via internal coolant pressure, air pressure or manual activation ring
BSF | Catalogue
pdf ・ 1,9 MB
Tool Selector
BSF Sortiment mit verschiedenen Aktivierungsarten

Range

The standard range consists of back counterboring tools for use with bore diameters ranging from 6.5 mm to 21 mm in 0.5 mm increments. The maximum possible counterboring diameter is 2.3 times the bore diameter. The tools can be activated by internal coolant pressure (min. 20 bar, max. 50 bar), by air pressure (min. 5 bar) or by manual activation ring.

Bore diameter rangeCounterbore diameterSeries
6.5 mm to 7.0 mm9.5 mm to 16.5 mmA series
7.5 mm to 8.5 mm11.0 mm to 20.0 mmB Series
9.0 mm to 10.0 mm13.5 mm to 23.0 mmC Series
10.5 mm to 11.5 mm15.5 mm to 26.5 mmD series
12.0 mm to 14.0 mm18.0 mm to 32.5 mmE series
14.5 mm to 17.0 mm21.5 mm to 39.5 mmF series
17.5 mm to 21.0 mm26.0 mm to 49.0 mmG Series

Should no standard tool solution be available for your application, HEULE can make a detailed application analysis. The result will be an application-specific solution. 

More about custom developments

Construction

The BSF is specially designed for automatic operation and is ready for use immediately. It does not require a torque arm or any machine adaptations. The simple design of the back counterboring tool enables the swift replacement of individual parts and blades. Standard range carbide blades are coated and available in increments of 0.5 mm. The specially designed geometry of the tool ensures that chips and dirt are reliably flushed out of the blade window during counterboring.

 

Depending on the machine environment and application requirements, you can choose between the internal coolant pressure, air pressure or manual activation ring activation types. The modular design enables retrofitting within the standard range. Existing tools can be retrofitted if required.

BSF
BSF Air
BSF Manual
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Tool Concept
  1. Blade 
  2. Split pin 
  3. Control bolt 
  4. Relief bore / internal coolant
  5. Blade housing
  6. Clamping screw 
  7. Pressure spring
  8. Stop screw for piston safety
  9. Pistons
  10. Shaft
BSF | Blade Change
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Tool Concept
  1. Blade 
  2. Split pin 
  3. Control bolt 
  4. Relief bore / internal coolant
  5. Blade housing
  6. Clamping screw
  7. Pressure spring
  8. Stop screw for piston safety
  9. Shaft
  10. Air cylinder
  11. Air piston
BSF | Blade Change
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Tool Concept
  1. Blade
  2. Split pin 
  3. Control bolt
  4. Blade housing
  5. Pressure spring
  6. Activation ring
  7. Piston
  8. Locking pin
  9. Shaft
  10. Activation spring
BSF | Blade Change
BSF Manual | Product video
Arbeitsweise Senkwerkzeug BSF

Process steps description

The tool is moved in rapid feed in front of the bore. When the internal coolant is activated, the pressure on the control bolt causes the blade to retract. Alternatively, the blade can be activated with air or by turning the manual activation ring. In this position, the tool moves through the bore. After turning off the internal coolant and activating the spindle rotation, the blade is extended. In working feed, the counterbore is now machined on the back of the bore. Once the blade is in the cut, the internal coolant can be switched on again.

 

Once the tool has reached the desired bore depth, the internal coolant is switched off. The tool is then removed from the counterbore and the spindle is stopped. The subsequent activation of the internal coolant ensures that the blade folds in again, allowing it to rapidly traverse out of the bore with activated internal cooling (if available). 

 

Downloads

Do you wish to find out more about BSF technology? Visit our downloads section for detailed information, videos and operating instructions. 

BSF | Catalogue
BSF | Catalogue
pdf ・ 1,9 MB
BSF Manual | Flyer
BSF Manual | Flyer
pdf ・ 2,0 MB
BSF | Cutting Data
BSF | Cutting Data
pdf ・ 91,0 KB
BSF | Programming Information
BSF | Programming Information
pdf ・ 163,4 KB
To the Media & Download Centre
Online-Seminar-backspotfacing

How does backspotfacing work?

We demonstrate this in our 20-minute Online Seminar "back SPOTFACING up to 2.3 x bore diameter". Click on the link below and have a look.

To the Online Seminar
Application examples
Back counterboring in action
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High voltage conductor cable | Avoid re-clamping by back spotfacing: The customer can manufacture the entire 500-piece batch without interruption or blade change.
Additional information about high-voltage conductor cable All sample applications
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Contact
Would you like to discuss your backspotface requirements?

We are pleased to assist.

Thanks to our worldwide network of branch offices and approximately 50 sales partners in 35 countries, HEULE competence and know-how is always within quick and easy reach.

Find your point of contact
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