The short answer is: yes, in many cases we can start a quotation from old saw blade photos. This is especially useful when the buyer wants to replace a blade that has already worked on the machine.
However, the old blade photo must show enough information. The most important point is to photograph the printed size marking on the blade body. If the printed information is missing, worn out or hidden by dirt, the quotation becomes less reliable and additional measurements are needed.
What Must Be Visible In The Old Blade Photo?
| Photo Or Data | Why It Matters | Example |
|---|---|---|
| Printed blade size | Confirms outer diameter, thickness or kerf, bore and tooth count. | 250 x 2.0 x 32 x 220T |
| Full front photo | Shows blade family, coating color, bore position and general condition. | HSS, GF, TCT or cermet blade appearance |
| Center bore and pin holes | Confirms whether the blade can fit the machine flange. | 32 mm bore, 2/8.5/45, 4/12/64 |
| Tooth close-up | Helps judge tooth form, tooth damage, coating wear and whether the blade has welded tips. | HSS tooth, carbide tip, cermet tip, flying saw tooth |
| Machine or flange photo | Useful when pin holes, slotted holes or special center design are unclear. | Machine spindle, pressure plate or old blade installed on machine |
| Cutting material | Helps avoid quoting the right size but wrong blade type. | Stainless tube, carbon steel bar, aluminum profile, wood panel |
Different Blade Types Need Different Size Logic
Not every circular saw blade writes size in the same way. Before quoting, we need to understand whether the old blade is a solid HSS blade, a GF saw blade, a TCT blade or a cermet cold saw blade.
| Blade Type | Common Size Format | Photo Focus |
|---|---|---|
| HSS circular saw blade | Outer diameter x thickness x bore x tooth count | Printed size, coating, bore, tooth count, locating holes |
| GF saw blade | Usually managed as a special HSS-family blade for orbital tube cutting | Model, outer diameter, bore, tooth count, tube material and sample blade photo |
| TCT saw blade | Outer diameter x kerf / plate thickness x bore x tooth count | Example: 285 x 2.0/1.75 x 32 x 80T, tooth tip and silencing line |
| Cermet cold saw blade | Outer diameter x kerf / plate thickness x bore x tooth count, plus locating holes | Cermet tooth tip, bore, pin holes, machine model and cutting material |
What Can Be Judged From A Photo?
A good photo can tell us many things: whether the blade is solid HSS or tipped, whether it has coating, whether it has silencing lines, whether locating holes are present, whether teeth are broken, whether the blade has heavy wear, and whether the printed specification matches the buyer’s description.
For example, a TCT blade often has carbide teeth and may have silencing lines. A cermet cold saw blade is normally used on circular sawing machines for steel tube, bar or profile cutting. A GF saw blade has its own application logic for clean tube cutting. These differences matter because the same diameter does not mean the same blade.
What Cannot Be Confirmed By Photo Alone?
Some details cannot be safely confirmed from a photo alone. These include exact steel grade, exact coating grade, heat treatment condition, body runout, precise tooth angle, machine rigidity, cutting speed, feed per tooth and the real workpiece condition.
This is why we may still ask for the machine model, cutting material, tube wall thickness, bar diameter, coolant condition or current cutting problem. A supplier should not quote only from appearance when the application is unclear.
If The Printed Size Is Missing
If the marking on the old blade is missing, the buyer should measure the blade manually. At minimum, confirm outer diameter, blade thickness or kerf, bore size, tooth count and locating hole pattern. For tipped blades, it is best to measure both kerf and plate thickness.
HSS / GF: OD x thickness x bore x tooth countTCT / cermet: OD x kerf / plate thickness x bore x tooth countIf measurement is difficult, send the old blade photo together with a ruler or caliper in the picture, and include the machine model or the old purchase record if available.
Recommended Photo Set For Quotation
Full Blade
Take one straight front photo of the complete blade, not only a small corner.
Printed Marking
Take a close-up of the size and material information printed on the blade body.
Bore And Holes
Show the center bore, pin holes, slotted holes or special mounting pattern clearly.
Tooth Detail
Take a close-up of the tooth edge so we can identify tooth type and wear condition.
FAQ
Can you quote a saw blade only from an old blade photo?
Often yes, if the photo clearly shows the printed size information and the blade type. For a reliable quotation, we also need cutting material, machine information and any special bore or pin hole requirement.
What is the most important photo for replacement saw blade quotation?
The close-up photo of the printed size on the old blade is the most important. It usually shows outer diameter, thickness or kerf, bore and tooth count.
Why is a tooth close-up useful?
The tooth close-up helps identify whether the blade is solid HSS, TCT, cermet tipped or a special blade. It also shows tooth wear, broken teeth and possible application problems.
Can an old photo confirm the exact material grade?
No. A photo can suggest the blade family, but exact material grade or coating grade should be confirmed by marking, purchase record, drawing, certificate or supplier experience.
Conclusion
Old saw blade photos are very useful for replacement quotations, but they must be clear and complete. The safest approach is to send a full blade photo, the printed size close-up, bore and pin hole photo, tooth close-up, machine information and cutting material. This prevents a common problem: quoting a blade that looks similar but does not fit the machine or cutting condition.