A buyer searching for Soft Jaw is usually trying to stop a bad substitute. A CNC machine is specified by travels, spindle or process, accuracy, control, and the parts you will actually cut. The notes below are selection criteria for a Soft Jaw. They are not a catalog promise. Confirm every rating on the current datasheet, drawing, or test report for the revision you will receive.
What has to be true of Soft Jaw
A CNC machine is specified by travels, spindle or process, accuracy, control, and the parts you will actually cut. For a Soft Jaw, start from the duty, then the interface to the rest of the machine or the room, then the document that proves the claim. A lower price that leaves one of those blank is a different product.
Soft Jaw is easy to confuse with CNC Engraver. If the quote could be read as either, add the line that separates them: the rating, the fitment, or the standard named below. Link the drawing number to that line so receiving inspection can reject the wrong one.
Numbers that change the quote
| Line | What to write for Soft Jaw |
|---|---|
| Control | The control name and who can edit the program. |
| Tooling and table | Taper, table size, or the chuck. |
| Utilities | Power, air, and foundation. |
| Travels | X, Y, Z, and any rotary, in the work envelope you need. |
| Process | Mill, turn, laser, plasma, or EDM, with power. |
| Accuracy | Positioning accuracy and repeatability, and the method. |
How to compare two offers
Lay both quotes for Soft Jaw on one sheet and line up control, tooling and table, and utilities. If a cell is empty, the offer is not finished. Ask for the missing line in writing. When those match, the honest difference is lead time, the test evidence, and who carries the warranty. Do not average a fully specified Soft Jaw with a cheaper line that omitted control.
Documents worth having before the deposit
Ask for an accuracy statement and a layout with service space. The file should name Soft Jaw and the revision, not only the supplier’s homepage. A factory quality certificate such as ISO 9001 can sit beside that file. It does not replace it.
Failures that show up after delivery
- Understating spindle power for the material.
- Buying travels that the fixture then consumes.
- Ignoring the control your programmers know.
On a Soft Jaw, the expensive version of the first mistake is discovering it after the goods are in the crate. Put the rejection condition in the purchase order while the supplier can still restate the offer.
A worked RFQ line
Use this shape, then replace the brackets with your duty: “Soft Jaw — State travels, process and power, accuracy, control, and utilities.” That sentence is a template, not a rating of any brand. If a supplier’s datasheet uses different units, convert them onto this sheet so the next offer can be compared.
Where words like RoHS / CE belong
Searches often add a constraint to Soft Jaw: RoHS / CE, or stainless / corrosion. Keep those on this page. RoHS is a material limit. CE is a declaration that lists the rules relied on. Ask for the document that names this part number and revision. Name the alloy or the coating and the chemical it must survive. Stainless is a family, not a guarantee. If you need a third constraint, add it as another line on the same drawing. A second URL that only swaps the adjective does not give a buyer a second fact.
Related in this section: how to specify CNC Engraver.
Questions buyers actually ask
What should an RFQ for Soft Jaw include?
State travels, process and power, accuracy, control, and utilities.
Is a cheaper Soft Jaw the same part?
Only if control, tooling and table, and the documents match. A missing line is a different offer.
Do waterproof, OEM, or IP words need their own page?
No. For Soft Jaw they are extra lines on this specification. Ask for the test or the drawing that gives the word a value.