Stone Grader SP-650 Tormek T-4/T-8

Tormek SP-650 stone grader for T-4/T-8

The Tormek SP-650 stone grader allows you to change the grinding stone's grit size from coarse (approx. 220 grit) to fine (approx. 1,000 grit). It is used to adjust the surface of the grinding stone so you can easily switch between fast material removal and precise fine grinding – all with the same stone.

Highlights

• Adjusts the grinding stone's grit size from 220 to 1,000 grit
• Compatible with both the Original Grindstone and Blackstone Silicon
• Fine side for polishing and maintaining the stone
• Coarse side for reactivating and cleaning the grinding stone
• Compatible with Tormek T-8, T-4 and older models
  
  

Fine grinding or fast material removal

With the SP-650 stone grader you can quickly alter the surface of your Tormek grinding stone to achieve precisely the grinding effect you want. Press the fine side of the stone grader against the rotating stone to make it finer – ideal for the finishing stage where you want a sharp, polished edge. When you need to remove more material quickly, use the coarse side, which restores the stone's original, more aggressive structure.

Versatility and efficiency in a single stone

Tormek's SG-250 and SG-200 Original Grindstone as well as the SB-250 Blackstone Silicon are designed to change character with the help of the SP-650. This means you can handle both coarse and fine grinding on the same stone without changing the set-up or angle, saving time and improving precision.

Maintaining the grinding stone

Use the coarse side of the stone grader to clean and reactivate the surface of your grinding stone so it retains its effectiveness over time. Press it firmly against the stone for approximately 30 seconds – this causes minimal wear to the stone and can be repeated as often as needed. For Japanese water stones (SJ-250 or SJ-200), use only the fine side for gentle cleaning.

Material and construction

The SP-650 is made from ceramic-bonded silicon carbide, ensuring a long service life and effective action against the grinding stone. The robust design makes it suitable for repeated use without losing its shape or function.

Technical specifications

• Weight: 0.45 kg
• Colour: Grey
• Material: Ceramic-bonded silicon carbide
  
  

Frequently asked questions

• Which Tormek grinding stones is the SP-650 compatible with?
  It works with the SG-250, SG-200 and SB-250, as well as the Japanese water stones SJ-250 and SJ-200 (the fine side only for the latter).
  
  
• How often should the stone grader be used?
  Use it as needed – for example when the stone feels smooth or its cutting performance has diminished.
  
  
• Does the stone grader wear down the grinding stone?
  No, correct use results in minimal wear and can be carried out repeatedly without any issues.
  
  
• How do I know when the stone has changed character?
  You can both see and hear a change in the surface – the stone becomes either smoother or rougher depending on which side you use.
  
  

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