We offer multiple shipping options based on destination and order size. Estimated delivery times are as follows:

• Standard Shipping: 7–15 business days
• Express Shipping: 3–7 business days

Delivery times are estimates and may be affected by customs clearance, weather conditions, or other unforeseen circumstances.

Shipping costs are calculated at checkout based on product weight, dimensions, shipping method, and destination. All applicable fees will be displayed before order confirmation.

Lead time determines how quickly your order is processed and delivered.

• Standard (15–20 days): Balanced speed and cost

• Economy (20–30 days): Lower cost with longer production time

Faster lead times may result in higher pricing due to production prioritization.

Tolerance defines the allowable deviation in your part dimensions. Choosing a tighter tolerance ensures higher precision but may increase machining time and cost.

• GB/T 1804-2000 m (Medium Standard): Suitable for general-purpose parts without strict precision requirements.

• ±0.10 mm: Recommended for most functional parts, offering a good balance between accuracy and cost.

• ±0.05 mm: Ideal for high-precision components or tight-fitting assemblies.

If you’re unsure, we recommend selecting ±0.10 mm for most projects.

International shipments may be subject to customs duties, taxes, or import fees. These charges are the responsibility of the customer and are not included in the product price or shipping fee.

Once your order has been shipped, you will receive a confirmation email with tracking information. Tracking updates may take 24–48 hours to become available.

We currently do not ship to P.O. boxes or APO/FPO addresses. Certain regions may have shipping restrictions due to local regulations.

If your order is delayed or appears lost in transit, please contact our customer support team. We will assist in investigating the issue and providing a suitable solution.

For any shipping-related questions, please contact us at support@sainsmart.com.