These Cnc Machined Vacuum Pump Parts are the exact rotors, stators, end plates, and valve housings that keep your pump pulling at peak efficiency. We hold concentricity to 0.008 mm TIR, surface finish
These Cnc Machined Vacuum Pump Parts are the exact rotors, stators, end plates, and valve housings that keep your pump pulling at peak efficiency. We hold concentricity to 0.008 mm TIR, surface finish to Ra 0.4, and ship standard parts in 7 days from our Dongguan factory. Hardness up to HRC 58 for wear surfaces, and every batch is inspected with a CMM before it leaves the floor.
Vacuum pump performance dies when clearance grows. We machine rotor OD and stator bore on the same 4-axis CNC center in one setup. That kills stacking errors. Typical clearance we hold: 0.015–0.025 mm on oil-sealed rotary vane pumps. For dry screw pumps, we go tighter—0.010 mm on the flanks. You get consistent ultimate pressure, not a pump that loses vacuum after 500 hours.
We stock 6061-T6 aluminum for lightweight rotors, 304/316L stainless for corrosive media, and 4140 or 42CrMo4 steel for high-torque shafts. For vane pockets and lobe rotors, we heat treat to HRC 50–58 and then grind the sealing faces. Aluminum parts get hard anodizing (Class 3, 50 µm) to resist wear from carbon vanes. You pick the material; we handle the distortion control after heat treat.
An unbalanced rotor shakes your pump, wears bearings, and adds noise. We dynamically balance every rotor longer than 200 mm to G2.5 grade per ISO 1940. Runout on the journal and seal surfaces is checked on a V-block with a 0.001 mm resolution indicator. We reject anything over 0.008 mm TIR. That is the difference between a pump that hums and one that screams.
No exceptions. Each part goes through a 3-axis CMM for GD&T callouts, an air gauge for bore diameter, and a Rockwell tester for hardness. We send you a full inspection report with the shipment—PDF, not a vague certificate. If a critical dimension is off by 0.005 mm, we scrap it, not ship it. You want proof, not promises. We give you data.
Rough surfaces trap gas and increase outgassing, which kills ultimate vacuum. We machine sealing faces to Ra 0.4 as standard. For high-vacuum applications, we polish to Ra 0.2 or add a lapping pass to Ra 0.1. Internal flow channels get Ra 0.8 to reduce friction losses. These are not cosmetic choices—they change your pump’s pumping speed by up to 8% on the same motor.
Prototype Cnc Machined Vacuum Pump Parts ship in 7 days. Production runs of 50–5000 pieces take 15–20 days. We run lights-out CNC cells 24/5, so your order is not waiting in a queue. No MOQ—order one part to test or a thousand for assembly. Tooling is free for standard sizes. For custom geometries, we quote a one-time setup fee and return it after 500 pieces.
NPT, BSPP, and SAE threads are cut with single-point tooling, not taps, for leak-free sealing. O-ring grooves are machined to AS568A dimensions with a dovetail option for O-rings that stay put during assembly. Ports are deburred and chamfered internally to prevent particle generation inside the pump cavity. We know that a single burr in a vacuum line can cause a catastrophic leak. We eliminate that risk.
| Specification | Value / Range |
|---|---|
| Materials | 6061-T6 Al, 304/316L SS, 4140, 42CrMo4, brass, PEEK |
| Rotor diameter range | 20 mm – 400 mm |
| Hardness (steel parts) | HRC 50–58 (case or through-hardened) |
| Hardness (aluminum) | Hard anodized Class 3, 50 µm |
| Machining tolerance | ±0.005 mm on critical features |
| Concentricity (rotor to bore) | 0.008 mm TIR max |
| Surface finish (sealing faces) | Ra 0.4 standard, Ra 0.2 optional |
| Dynamic balance (rotors >200 mm) | G2.5 per ISO 1940 |
| Lead time (prototype) | 7 days |
| Lead time (production) | 15–20 days |
| MOQ | No MOQ (1 piece accepted) |
| Inspection report | CMM, air gauge, hardness test PDF included |
No MOQ—we machine a single prototype or a full production run; your cost per piece drops as quantity rises, but we never force you to overorder.
Yes, send your drawing or a sample part—we reverse-engineer it with a 3D scanner and confirm every critical dimension before cutting metal.
We use temperature-controlled machining (22°C ±1°C) and measure with CMM and air gauges in the same room, so thermal expansion never fakes a reading.
For standard materials and simple rotors, we can ship in 5 days with an express fee; normal prototype lead time is 7 days, production 15–20 days.
For material selection tips on abrasive or tough alloys, read our CNC cutting tool selection guide. To understand how we hold ±0.005 mm reliably, check the CNC machining tolerances guide.
Send your drawing today. Get a firm quote within 12 hours. Email sc@bquq.com or WhatsApp +86 13713157787. Precision manufacturing, made in China, with no MOQ—your vacuum pump runs better on our parts.
| Parameter | Capability |
|---|---|
| Materials | AL6061/7075, SUS303/304/316, 45# steel, T2 copper, H59 brass, POM, PEEK, nylon |
| Tolerance | ±0.005mm standard, ±0.003mm on request |
| Machines | 3/4/5-axis CNC, turn-mill, Swiss lathe |
| Surface | Anodizing, nickel, zinc, passivation, sandblast, polish |
| Size Range | Max 400 x 300 x 200 mm |
| Prototype | 72 hours, no MOQ on samples |
| Inspection | Full report per batch, CMM data on request |
