Keep working width and knife dimensions separate
Bosch’s GHO 12V-20 provides a clear example: its maximum planing width is 56 mm, and the UK product page separately identifies supplied knives measuring 56 × 5.5 × 1.1 mm under part 2 608 000 672. The full knife dimensions and part code add information that “56 mm planer” leaves out.
Where a source gives only an 82 mm working width, record it as working width. Do not turn that figure into an assumed knife length, thickness or mounting specification. A generic width search is a starting point for research, not proof of a replacement match.
Use the diagram for the exact tool article
Bosch’s service catalogue identifies GHO 18V-LI article 3 601 EA0 301 and GHO 26-82 D article 3 601 EA4 370 separately. Their parts lists both name planing knife 2 608 635 341. The knife appears at position 851 in the first diagram and position 74 in the second.
This establishes a documented shared part for those two articles. It does not extend the match to every planer sold with a similar model name. Also, the short diagram position is a locator within that drawing; use the complete spare-part number when searching for the item.
Check the knife system before buying
The GHO 12V-20 manual specifies its HM/TC knife type. It describes two cutting edges and says the knife must not be resharpened. That is a model-specific instruction, so avoid assuming that every planer knife can be sharpened, reversed or substituted with another material.
Read the replacement section of your own manual before ordering. Keep any knife-type requirement with the part number, and check the quantity stated in the offer. A pack quantity does not, by itself, tell you how many knives your cutter head uses.
Make a purchase note you can reuse
Save the tool article number, knife part number, source link, documented dimensions and the offer’s pack contents in one note. If the seller gives a different code, look for manufacturer confirmation of the replacement relationship. A close photograph or a long compatibility list does not resolve a conflicting part number.
For fitting or adjustment, follow the exact tool manual or obtain manufacturer service help. This buying check identifies the part; it does not replace the installation instructions.
Before you buy
- Match the article number on the planer to the manufacturer’s parts catalogue.
- Use the complete knife part number, not the diagram position.
- Treat working width and physical knife dimensions as different fields.
- Confirm the specified knife type and offered quantity.
- Resolve conflicting part codes with the manufacturer before ordering.