A buyer searching for Shrink Tunnel is usually trying to stop a bad substitute. A machine tool or production machine is specified by the work envelope, the accuracy, the power, and the duty cycle. The notes below are selection criteria for a Shrink Tunnel. 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 Shrink Tunnel
A machine tool or production machine is specified by the work envelope, the accuracy, the power, and the duty cycle. For a Shrink Tunnel, 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.
Shrink Tunnel is easy to confuse with Tube Bender. 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 Shrink Tunnel |
|---|---|
| Control | The controller family and who can service the program. |
| Utilities | Electrical supply, air, and foundation or floor load. |
| Safety | Guards and the declaration for the machinery rules that apply. |
| Capacity | The largest part or cut the machine is being bought to make. |
| Accuracy | Positioning or machining tolerance, and how it is measured. |
| Power and axes | Spindle or drive power, and the number of axes if it is a machine tool. |
How to compare two offers
Lay both quotes for Shrink Tunnel on one sheet and line up control, utilities, and safety. 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 Shrink Tunnel with a cheaper line that omitted control.
Documents worth having before the deposit
Ask for a layout drawing with service clearances before the machine is shipped. The file should name Shrink Tunnel 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
- Leaving accuracy undefined so two quotes cannot be compared.
- Buying travels that the workholding then eats.
- Ignoring foundation and incoming power until the crate arrives.
On a Shrink Tunnel, 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: “Shrink Tunnel — State capacity, accuracy, power, utilities, and the control.” 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 outdoor belong
Searches often add a constraint to Shrink Tunnel: outdoor, or automotive grade. Keep those on this page. Outdoor means UV, temperature cycle, and corrosion, not only a gasket. Name the climate and the years the gasket is expected to last. Automotive grade is a temperature, vibration, and documentation claim. Ask which AEC or customer spec is actually met, and for which part number. 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 Tube Bender.
Questions buyers actually ask
What should an RFQ for Shrink Tunnel include?
State capacity, accuracy, power, utilities, and the control.
Is a cheaper Shrink Tunnel the same part?
Only if control, utilities, and the documents match. A missing line is a different offer.
Do waterproof, OEM, or IP words need their own page?
No. For Shrink Tunnel they are extra lines on this specification. Ask for the test or the drawing that gives the word a value.