Why buyers send the same drawing to five CNC shops, and how to stand out

Five shops in the same industrial belt get the same drawing on the same morning. The buyer is not hunting for the cheapest of five so much as the safest. The buyer compares how fast each shop replied, what it asked about the part, and how plainly its quote says what is included. Those are in your hands. Find out why the drawing went to five, decide how much effort it deserves, then win on the reply rather than on the rate.

Why did the drawing go to five shops?

A purchase engineer does not send a drawing to five shops for fun. There are four common reasons, and each one deserves a different amount of your estimator's time.

Ask one question if the drawing does not tell you: "Is this a new part, or one you buy today?" Most buyers answer it, and the answer sets your effort for everything that follows.

The first hour

Within an hour of the drawing arriving, send an acknowledgement. Four lines are enough: you received drawing number and revision, the name of the person costing it, the date the quote will reach the buyer, and one question about the part.

That one question carries more weight than anything else in the message. It has to come from the drawing, not from a template. "Thread M10 on section B: is the 6H class required, or would 6G suit after plating?" shows a shop that has read the sheet. "Please share full details" shows a shop that has not. The full list of what to settle before pricing is in how to quote a CNC part; in the first hour you need only the one that matters most.

Then meet the date you gave. A quote that arrives on the promised day, even a day after another shop's, reads better than a fast one that contradicts its own covering message.

What one suggestion can save the buyer?

On a new part, look for one change that would make it cheaper to machine without hurting its function. Common ones on job-work drawings:

• An inside corner radius smaller than any standard end mill, which forces a slow, small tool or a second operation.
• Threads specified deeper than the mating bolt can use.
• Tolerances on non-mating faces as tight as on the bearing seats.
• A material grade that is slow to buy in the bar size needed, where a common grade would do the job.

Offer the change as an option with two prices: one for the drawing as it stands and one with the change. Never change the drawing on your own. Only the buyer's design engineer can approve it, and a buyer who receives a quote against a part nobody drew will set it aside.

Skip this on a part already running at another shop. A released drawing in production needs approvals to change, so your suggestion becomes the buyer's paperwork, not a saving.

When does the comparison close?

Before you send the quote, ask one more thing: "When do you plan to close the comparison?" That date tells you when to follow up. Call the day before it, not a week after you sent the quote.

If you lose, call anyway and ask two things: where your price sat against the winner, and what decided it. Write the answer next to the quote in your enquiry records. After a few lost quotes you will see whether you lose on price, on lead time or on silence, and that tells you what to change. For quotes that stall in approvals, our post on why buyers go quiet after a quotation covers what to send next.

Imagine a VMC shop in Bhiwadi

Imagine a VMC shop in Bhiwadi, machining aluminium housings and brackets for electrical and automotive makers around the NCR. The details are illustrative. It sent plenty of quotes but rarely heard back, so the owner asked a buyer the owner knew well how the shop's last quote had looked against the others.

The shop's reply, sent two days after the drawing, read: "Rate ₹X per piece, delivery three weeks, GST extra." It did not say three weeks from what, or whether anodising was included.

The shop that won had replied within the hour and named the person costing the part. It asked whether a 0.5 mm inside radius on a pocket could open to 1 mm. Its quote gave two prices, one for each radius, said "three weeks from purchase order" and listed anodising as its own line.

The owner changed three habits after that call. Every drawing now gets a four-line acknowledgement the same hour, with a real question. Every quote states what its lead time is counted from and lists outside processes on their own lines. And on new parts only, the estimator looks for one cost-saving change before pricing. The rate itself did not move.

What you cannot win on

Some quotes are lost before you open the file. A shop with lower overheads will beat you on simple turned parts if price is the only test. On a benchmark, assume the incumbent keeps the part unless the buyer tells you otherwise. A reverse auction rewards the lowest number and nothing else. In those cases quote correctly, keep your name on the list, and save your best work for drawings with no current supplier.

The layout of the quote itself is in what to put in an RFQ reply. Making the four-line acknowledgement a habit for whoever opens the inbox is lead response and follow-up work. A VMC shop and a turning shop see the five-shop drawing from different buyers, and the CNC machining and precision engineering section looks at each process separately.

Ring one buyer you lost to

Pick a recent lost quote and a buyer who will talk to you honestly. Ask how your reply looked beside the winner's, and write down the first thing the buyer says. Change that habit first. If you would rather go through a pile of lost quotes with someone outside the shop, tell us what you need.