The BOSCH PKS66 comes with an Allen key to lock the spindle when changing the blade. If you have lost it, you can replace it with a standard Allen key.
Although the manual for your PKS66 does not specify the exact size of the Allen key, the most common sizes for this type of circular saw are 3 mm, 4 mm, or 5 mm. To find the right one:
- Test progressively - Start with a 3 mm Allen key, then try 4 mm, and finally 5 mm until you find the one that fits perfectly into the spindle lock hole (located on the side of the saw head).
- Never force - The key should fit in easily. Forcing it could damage the locking mechanism.
Once the correct size is identified, you can obtain a replacement Allen key from:
- An authorized BOSCH dealer (they have original spare parts)
- A specialized spare parts website (make sure the size matches your measurement)
- A tool accessory supplier (hardware store, specialized tool shop)