5 Common Reasons for CNC Turning Delivery Delays

In the manufacturing industry, delivery delays can result in significant losses. Especially with CNC turning, when suppliers fail to meet deadlines, it can lead to halted production lines and strained customer relationships. You’ve probably faced a situation where a supplier promises a 10-day delivery time but takes 20 days instead, disrupting your production schedule and leaving your clients chasing. So, why are CNC turning deliveries prone to delays? What are the factors behind these delays?

1. Bar Stock Not Available

The Problem:
CNC turning requires bar stock, which comes in various diameters and grades (such as steel, aluminum, brass, and others). The availability of material plays a crucial role in the delivery time.

• Many shops place orders and then source the material, but this process isn’t always seamless.
• Common materials might be in stock today and gone tomorrow, leaving your order waiting.
• Non-standard diameters require mill runs, extending lead times up to 3 weeks or more.

Our Approach:

• We stock standard diameters (6–100 mm) for 3 months of typical consumption, including materials like 45# steel, Q235, 304 stainless steel, 6061 aluminum, and H59 brass.
• For non-standard diameters, we maintain at least one month of stock, ensuring we can accommodate custom needs without delay.
• When your order is placed, the material is already on the shelf and ready to go. There’s no waiting for the supply chain to catch up.

2. Tooling Not Ready

The Problem:
Turning uses indexable inserts, which wear over time. When these inserts wear out, cutting forces change, dimensions shift, and surface finish degrades. If tooling isn't monitored, it can create significant delays:

• Operators find the inserts worn only when it’s too late — the machine stops.
• Lack of proper tooling results in unplanned downtime.
• Different materials require specific inserts, and shops often use a one-size-fits-all approach, leading to inefficient tool usage and frequent tool changes.

Our Approach:

• During programming, we document the insert grade and estimated usage for every part.
• Tool crib staff checks inventory well before production begins, ordering any missing tools one week in advance.
• We track insert life during production, prompting for tool changes at a specific part count — before failure occurs.
• By the time your order hits the machine, the necessary inserts are already staged, ready to be used, ensuring zero delays due to tooling issues.

3. No Backup Machine for Equipment Failure

The Problem:
CNC turning involves complex machinery that is prone to failure. Whether it’s the spindle, hydraulic system, or coolant pump, failures can occur, especially if the shop has limited machine redundancy:

• A single machine failure can cut your capacity by 30% to 100%.
• If one machine breaks down, your parts need to be moved to another machine, requiring new tool offsets, setup, and verification, leading to additional delays.

Our Approach:

• We maintain redundant capacity for all critical machines. For instance, our large-bore lathe, which handles parts up to 200mm in diameter, has an identical backup.
• If one machine goes down, the program, offsets, and tooling are transferred to the backup machine within 2 hours.
• The backup machine is identical to the original, so offsets don’t need to be recalibrated, and production continues without delays.

4. Production Scheduling Chaos

The Problem:
Production scheduling often falls prey to chaos, and insert jobs or urgent orders can easily displace your order, leading to delays:

• Shops without formal scheduling systems often prioritize based on urgency, which means your order might be pushed back when a new, more urgent job comes in.
• This can create significant confusion, as confirmed delivery dates are moved without customer notification.

Our Approach:

• Every Friday, we lock our production schedules for the following week, which means no changes can displace confirmed orders once the schedule is locked.
• If an urgent order requires rescheduling, we notify customers 72 hours in advance. Additionally, any changes in delivery due to an emergency are communicated and approved by the customer.
• If any order cannot meet the deadline, we assume responsibility for all expedited shipping costs.

5. Inspection Bottlenecks

The Problem:
Turning parts often involve high volumes, and inspecting each part for critical dimensions can become a bottleneck, especially when multiple orders are stacked up:

• Shops often complete entire batches first, then send them for inspection, causing delays as CMMs queue up and backlog builds.
• This means the parts are finished but can’t ship because they are waiting for quality control.

Our Approach:

• We inspect in-process, not just at the end of the production cycle. Every 50 parts undergo critical dimension checks, ensuring the quality is consistent during production.
• Any drift detected is addressed immediately by adjusting tool offsets to correct the issue.
• The last part of the batch receives a final inspection to ensure everything meets the tolerance limits, and the batch ships the same day.

Our Delivery Commitment

The five problems mentioned above aren’t related to technical limitations but to management practices. At our shop, we implement strict control measures to prevent these issues.

• Standard Delivery:
  • For parts up to 100mm diameter, with material in stock: 7 working days from drawing confirmation.
  • If special material or tooling is required, the delivery date is confirmed at order entry and won’t change without customer approval.
  • If there’s a delay, we notify the customer 72 hours in advance — not after the customer calls to inquire.
• Expedited Orders:
  • If your order is urgent, we offer an expedited channel with 3 working days delivery. There’s no additional fee for expediting — only your confirmation of priority.

Let’s Discuss Your Next Project

If you have a turning part to discuss, send us your drawing. We’ll provide:

• Material availability
• Tooling requirements
• Scheduled production week
• Confirmed ship date

Every aspect of your order is documented, so you’ll never be left wondering about delays.

Contact us today, and we’ll ensure your CNC turning parts arrive on time.