Manufacturing Standards

RapidDirect provides 3, 4, 5 axis CNC milling, CNC turning, and post-processing services for the diverse manufacturing requirements. Our general tolerances are +/-0.125mm (+/-0.005") and tighter tolerances up to +/-0.01mm (+/-0,000393") is available on your request.
We are experienced in sheet metal fabrication services, featuring high tolerance and wide thickness range laser cutting, bending capabilities, along with various post-processing options.
Various injection molding services, including rapid tooling, family molds, multi-cavity molds, over molding, etc. are provided here at RapidDirect. Check the default manufacturing standards below:
Favored in functional parts prototyping, 3D printing is the rising service in RapidDirect business. We provide mainstream FDM, SLA, SLS, Polyjet, for other technologies please contact us.
Part sizeToleranceAngularity
< 300 mm (12″)± 0.125 mm (± 0.005″)± 0.5°
< 600 mm (24″)± 0.250 mm (± 0.010″)± 1.0°
< 900 mm (36″)± 0.400 mm (± 1/64″)± 1.0°
< 1500 mm (60″)± 0.8 mm (± 1/32″)± 1.0°
> 1500 mm (60″)± 1.6 mm (± 1/16″)± 1.0°

Forming and bending+/- 0.020”
Bend to hole or feature+/- 0.010”
Linear dimensions excluding locations to bends+/- 0.005”
Diameters with inserts+0.003/-0
Angularity+/- 2 degrees
Surface roughness (blank material)Ra 125 uin max
Surface roughness (timesave)Ra 100 uin max
Part size (mm)Precision toleranceOrdinary mold tolerance
FDM± 0.5% with a lower limit of ± 0.5 mm (± 0.020″)
SLA± 0.5% with a lower limit of ± 0.15 mm (± 0.006″)
SLS± 0.3% with a lower limit of ± 0.3 mm (± 0.012″)
Polyjet± 0.1% with a lower limit of ± 0.1 mm (± 0.004″)

Rapid Direct Quality Control System

In order to deliver consistently high-quality parts that meet our customer needs, we employ a series of inspection methods, covering the entire manufacturing process.

Pre-Production Quality System

Technical assessment

Before the production starts, RapidDirect engineering team check and confirm on the material, structure, process, and other details of your 3D and 2D drawings. This prevents possible mistakes and unachievable requirements at the very beginning.

Material verification

On the request of customers, we provide the certification of the material used in the manufacturing process. The report comes from the raw material manufacturer and usually includes: material heat number, material grade, material dimensions, mechanical properties, chemical analysis, etc.

During Production Quality Control

On-site inspection system

It is fundamental and vital in precision machining that the material block is always at the right position. With on-site inspection system, the machines automatically examine the positions, and make adjustments accordingly. This avoids the issues at the early stage, and help save cost and time.

In-process quality control

At RapidDirect, we strictly obey the ISO9001:2015 requirements.  The quality control staff conducts routine inspections for all parts that are being produced every 2 hours.

First article inspection

To give our customers peace of mind before moving into mass production, we offer First article inspection for injection molding orders, and can be specially requested for CNC machining. We will examine the sample part, and provide inspection report with images. We will ship the part for your verification when necessary.

Before Delivery Final Checkup

Full-dimensional inspection report

For orders on RapidDirect platform, we provide full dimensional inspection report on customers’ request. The report includes: quantity of parts, critical dimensions, threads and tolerances, thicknesses and depths, part appearance, etc.


The logistics is unpredictable, so we try our best to lower the risks for you. 4 layers of protection are applied on the package: 1. Wrapping paper 2. EPE 3. Foam 4. Paper/Wooden box.  We dedicated to delivering the most high-quality and beautiful parts to meet your expectations.

Design Verification Program

To give our customers peace of mind before moving into production, we offer First Part Verification.

The program, which reduce risks and ensure the parts meet your requirements, is open for orders that include a minimum individual part quantity of 50 units or $5,000 USD order value.


  • You request first article inspection for a quote that meets our design verification program requirements.
  • RapidDirect reviews the quote and grants you access to utilize DVP.
  • You sign the quote provided by RapidDirect and agree on DVP Terms and Conditions.
  • We produce two of the parts and sends them to you.
  • You receive and examine the parts, then inform RapidDirect that full­scale production may begin.
  • The full production starts and is delivered within lead time.

Quality Reports & Certifications

full dimension inspection

Full Dimensional Inspection Report

For every order on our platform, we provide a full dimensional inspection report on customers’ request. Dimensions are verified using a precision measuring instrument (caliper or gauge) and with a Coordinate Measuring Machine when required. The report includes:

  • Quantity of parts
  • Critical dimensions
  • Threads and tolerances
  • Thicknesses and depths
  • Part appearance
material certification

Material Certification

On the request of customers, we can provide the certification of the material used in the manufacturing process. The report comes from the raw material manufacturer and usually includes:

  • Material heat number
  • Material grade
  • Material dimensions
  • Mechanical properties
  • Chemical analysis
  • Heat treatment (if applicable)

Guaranteed Quality

RapidDirect Co.,Ltd strictly follow and implement ISO quality standards and have passed ISO 90001: 2015 certification. You can click here for download certificate report.

Real Customer Feedback

Testimonial 1 Quality

The parts arrived on Monday. Thanks for the prompt service and attention to our order. We have inspected the parts and installed them in one of our assemblies. The quality, fit, and finish are excellent. I will place an order for a larger quantity.

— Jessie Beck

Testimonial 2 Quality

I received the sample today and am very happy with the chrome finish as well as the overall look. I was also impressed with how well you packaged the items 🙂

— Alvaro Reese

Testimonial 3 Service

Getting the quotation online is a mind-blowing experience, and the result turned out to be impressive. It saves me a lot of time and efforts on communicating. 

— Toby Dalton

Inspection Equipment

RapidDirect employs X-Ray Fluorescence (XRF) analysis, a non-destructive testing method that uses short-wave X-rays or gamma radiation to determine the elemental composition of metals, plastics and other materials, to inspect the quality of the materials.

After manufacturing is complete, an optical comparator, also known as a projector, is used to inspect components, precisely measuring their dimensions and comparing them to the original dimensions of the CAD model. Any inconsistencies detected by the projector are alerted in a detailed inspection report.

At RapidDirect, we use a second inspection process, Coordinate Measuring Machine (CMM) after manufacturing. By capturing a series of points from the object, CMM technology can accurately determine the dimensions of components. It is especially suitable for parts with complex geometries.

Resolving Quality Issues

Our number one priority at RapidDirect is delivering high-quality parts that meet customer requirements. If your order is not up to this standard and fails to meet specifications, please get in touch with us within five business days of receiving your order and we will resolve the problem rapidly, within 1-3 business days.

Occasions for rework:
- Unacceptable processing defects
- Fail to meet tolerance requirement
- Incorrect material/finish

Occasions for refund:
- The part is not machinable
- The customer does not agree to rework
- Other reasons

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