Dual-passage flange-mounted rotary joint with Ø30mm central bore for pneumatic and fluid transfer applications. AL6061 body with PTFE composite seal. Max 150 RPM, Ø76 mm outer diameter, 1230 g. Deep groove ball bearing supports radial loads up to 5 N·m. Ships in 7 days.
BP-2P-30-0001 is a dual-passage rotary joint with a 30mm central bore, designed for medium-duty pneumatic and fluid transfer on automation rotary equipment. The deep groove ball bearing supports radial loads up to 5 N·m, making it suitable for side-mounted tooling and off-center fixtures. The sealing configuration may be suitable for selected air, water, or coolant applications, subject to medium compatibility, temperature, pressure, speed, and the approved specification for the selected version. Pressure and leakage test conditions should be confirmed before ordering.
| Model Number | BP-2P-30-0001 |
|---|---|
| Passages | 2-in-2-out (dual passage) |
| Bore Diameter | Ø30 mm |
| Rotor Connection | 4-M5 (rotating side) |
| Stator Connection | 4-M5 (fixed side) |
| Mount Type | Flange Mount |
| Max Pressure | 1 MPa (10 bar / 145 psi) — derate to 0.7 MPa for continuous water duty |
| Max Speed | 150 RPM — derate to 100 RPM for continuous water or coolant |
| Compatible Media | Air, water, water-soluble coolant, light hydraulic oil |
| Leakage acceptance | Specified by model; confirm test criteria before ordering. |
| Body Material | AL6061 Aluminum Alloy |
|---|---|
| Seal Type | PTFE composite seal with FKM O-ring backup |
| Bearing Type | Deep groove ball bearing |
| Operating Temperature | -20°C to +80°C |
| Net Weight | Approx. 1.23 kg (1230 g) |
| Dimensions | Ø76 × 70 mm |
| Running Torque | ≤5 N·m |
| Service Life | ≥8,000 hours (rated conditions) |
|---|---|
| Certifications | ISO 9001:2015, CE, RoHS |
| Warranty | 12 Months |
AL6061 aluminum body: 6061-T6 aluminum alloy with yield strength 276 MPa and hardness 95 HB. The anodized surface provides corrosion resistance for intermittent water and coolant exposure. At 1.23 kg, it provides enough mass for stability on medium rotary tables while keeping inertia manageable. Not recommended for continuous abrasive coolant without additional surface hardening — specify hard anodizing (Type III, 25 μm) or stainless steel (304/316) for such environments.
PTFE composite seal: Polytetrafluoroethylene with glass fiber and graphite filler. Self-lubricating, chemically inert, and rated for -200°C to +260°C. The composite structure provides structural integrity while maintaining the low friction coefficient (0.05–0.10 against aluminum) that makes PTFE ideal for rotary seals at 150 RPM. FKM O-ring provides static sealing at the housing interface.
Deep groove ball bearing: Single-row deep groove ball bearing (6202 or equivalent) with steel shields and lithium grease lubrication. The bearing supports radial loads up to 5 N·m and axial loads up to 2 N·m. This is the key difference from plain-bearing joints — it allows side-mounted tooling, off-center fixtures, and cantilevered loads that would cause rapid seal wear in a sleeve-bearing design. Bearing life is rated at ≥8,000 hours under rated load.
BP-2P-30-0001 is designed for dual-air-line applications on medium rotary equipment where a 30mm through-bore and ball-bearing support are required. This model may be suitable for the listed applications when its passage count, mounting, medium, pressure, speed, and temperature limits match the machine requirements.
Proper installation extends seal life from 6 months to 12+ months and protects the deep groove ball bearing from premature failure. The most common cause of early bearing wear on BP-2P-30-0001 is side-loading from rigid piping or misaligned flanges. Follow these steps for reliable operation.
Confirm your equipment flange dimensions and bolt pattern match the rotary joint flange specification. BP-2P-30-0001 uses a flange mount with specific P.C.D. and hole count. Do not force-mount on a mismatched pattern — drilling new holes in the Ø76 mm aluminum body creates stress risers that propagate under cyclic loading. Download the 2D drawing for exact flange dimensions, bolt circle diameter, hole size, and counterbore depth. Check flatness with a feeler gauge: the mating flange must be flat within 0.05 mm to prevent seal distortion.
Place the gasket between the flange faces. Tighten bolts evenly in a cross pattern to the specified torque. For M5 screws: 3–4 N·m. Overtightening beyond 5 N·m warps the AL6061 flange face, compressing the PTFE seal unevenly and creating an inter-passage leak path. Use a torque wrench and tighten in three stages: 50%, 75%, then 100% of final torque in a star pattern. This ensures even clamping force across the Ø76 mm flange diameter.
If your model includes an anti-rotation tab, secure it to a fixed bracket with an M4 or M5 screw. Never let the stationary body rotate with the shaft — the supply hoses will twist and the seal will experience reverse torque, accelerating wear. The anti-rotation arm should have 2–3 mm of clearance to allow for axial float during thermal expansion. A rigid anti-rotation arrangement that transfers vibration or side load into the housing can increase bearing load and may shorten service life.
Use flexible hoses (not rigid pipe) to connect the stationary side to the air supply. Rigid pipe transfers vibration and thermal expansion directly to the joint, stressing the seal and bearing. Install a 40-micron filter upstream to protect the PTFE seal from debris. For water or coolant, add a Y-strainer (60 mesh) to prevent particulate damage. Label the two passages (e.g., "Passage A" and "Passage B") to prevent cross-connection during maintenance. Use M5 push-to-connect fittings with thread sealant — do not overtighten plastic fittings into the aluminum ports.
Run at low pressure (0.2 MPa) and low speed (30–50 RPM) for 5 minutes without load. This beds the PTFE seal against the shaft surface and distributes grease within the deep groove bearing. Check for leaks at the flange gasket and seal interfaces. If dry, gradually increase to operating pressure and speed over 10 minutes. Skipping the run-in is the #2 cause of early seal failure on ball-bearing joints — the seal needs time to conform to the shaft surface finish, and the bearing needs initial grease redistribution before full radial load.
Full dimensions, tolerances, thread specs, flange bolt pattern, 30mm bore geometry, shaft finish requirements, and seal groove details. 120 KB.
Free 3D files provided after inquiry. Includes AL6061 body variant, flange mount geometry, 30mm bore, deep groove bearing housing, and M5 connection details. Use for CAD fit verification before ordering.
Complete guide: flange mounting, torque specs, anti-rotation, filtration, run-in procedure, bearing inspection, and maintenance checklist. 650 KB.
AL6061 aluminum material traceability, hardness test report, bearing specification sheet, and RoHS compliance certificate. Available upon request with order.
Not sure if BP-2P-30-0001 is the right model? Use this comparison to decide — and know exactly when to upgrade to a larger-bore, higher-passage, or dust-proof joint.
| Your Requirement | BP-2P-30-0001 Fit | Better Alternative | Why Upgrade |
|---|---|---|---|
| Dual air lines, 30mm bore, medium table (400–800 mm dia), radial loads ≤5 N·m | ✅ Perfect — ball bearing, 1.23 kg | — | — |
| Dual air lines, smaller bore (16 mm), lower cost | ✅ Good — but BP-2P-16-0001 is cheaper and lighter | BP-2P-16-0001 | 0.45 kg vs 1.23 kg, lower inertia for small tables |
| 4+ independent air functions, same 30mm bore | ❌ Too few passages | BP-4P-30-0001 | 4 passages with independent seals, same Ø76 mm envelope |
| Pressure >1.0 MPa (e.g., 2–10 MPa hydraulic) | ❌ Over pressure rating | BP-2P-95-0001 | 10 MPa rated, AL6061 + 45# steel composite body |
| Dusty or abrasive environment (steel mill, foundry) | ❌ No dust protection | BP-2P-50-0001 | Dust-proof seal and protective shroud, IP65 rated |
| Speed >150 RPM continuous with fluid media | ❌ Over speed rating | BP-2P-0001 | 500 RPM rated for high-speed rotary tables |
| Pneumatic + electric signals in one joint | ❌ No electrical circuits | BP-3P-S06-0001 | Pneumatic-electric hybrid with 3 pneumatic + 6 electrical circuits |
The #1 cause of BP-2P-30-0001 bearing failure is side-loading beyond the deep groove bearing rating. A machine builder mounts a 3 kg pneumatic grinder on a 200 mm arm attached to the rotating flange. The resulting radial load is 8 N·m — 60% over the bearing limit. Within 4 months, the bearing develops play, the seal wobbles, and both passages leak. Rule: Keep radial loads ≤5 N·m. For heavier side loads, specify a tapered roller bearing custom design or support the tooling with a separate bearing block.
A builder connects the stationary side with rigid steel tubing and mounts the joint on a hand-machined flange with 0.15 mm warp. The rigid pipe prevents the joint from self-aligning, and the warped flange creates a 0.15 mm gap at one edge. After 2 weeks, air leaks at 0.3 MPa from the high side of the flange. The builder replaces the gasket twice before realizing the flange needs resurfacing. Rule: Always use flexible hose (minimum 8 mm bend radius) and ensure the mating flange is flat within 0.05 mm. Check with a feeler gauge before installation.
A maintenance team installs BP-2P-30-0001 on a welding positioner, skips the 5-minute run-in, and immediately starts production with a 4 N·m side load. The PTFE seal has not bedded into the shaft surface, and the bearing grease has not redistributed. Within 6 weeks, the seal leaks and the bearing growls. The team replaces both components, but the same thing happens because they skip the run-in every time. Rule: Run at 0.2 MPa and 30–50 RPM for 5 minutes without load before full operation. This beds the seal and distributes bearing grease, extending life from 6 months to 12+ months.
Other rotary joints commonly purchased with BP-2P-30-0001 — or the models you upgrade to when your application outgrows a 30mm bore or 150 RPM.
The standard version uses AL6061 Aluminum Alloy body with PTFE composite seal and deep groove ball bearing. For full steel options or higher-temperature variants, contact our team. All versions are ISO9001 certified. The export version includes English-language documentation, CE marking, and RoHS compliance certificate. Both versions have identical pressure, speed, and temperature ratings. The deep groove ball bearing is standard on all versions.
Yes — the PTFE composite seal is compatible with water, water-soluble coolant, and light hydraulic oil (up to ISO VG 32). For continuous water duty, derate pressure to 0.7 MPa and speed to 100 RPM to reduce seal wear. The AL6061 aluminum body is anodized for additional corrosion resistance. For continuous water immersion or aggressive coolant, specify hard anodizing (Type III) or stainless steel (304/316) body. If your application involves deionized water, contact Begapunk for seal compatibility review.
BP-2P-30-0001 uses a flange mount with a specific bolt pattern designed for medium rotary tables. Download the 2D PDF drawing for exact flange dimensions, bolt circle diameter (P.C.D.), hole sizes, counterbore depths, and tolerances. Ensure your equipment mating flange matches before ordering. The Ø76 mm outer diameter requires approximately 90 mm clearance for hose routing. Custom flange patterns are available as special orders with 5–7 day additional lead time.
Yes — free 3D STEP and IGES files are provided after you send an inquiry. The file includes the AL6061 body variant, flange mount geometry, 30mm bore, deep groove bearing housing, M5 connection details, and anti-rotation bracket mounting hole pattern. Use the 3D file to verify clearance, port direction, flange bolt engagement, and bore alignment in your CAD assembly before ordering. 3D files may be provided for qualified projects after the application requirements are reviewed. File availability and response time depend on the model and the project information provided.
Upgrade when your application exceeds the 30mm bore, 150 RPM, 1 MPa, or 5 N·m radial load limits. Common triggers: (1) You need to route cables or pipes larger than 30 mm — contact Begapunk for custom bore sizes up to 50 mm. (2) Your table speed exceeds 150 RPM continuous — BP-2P-0001 handles 500 RPM. (3) Your pressure requirement exceeds 1.0 MPa — BP-2P-95-0001 handles 10 MPa. (4) Your side load exceeds 5 N·m — specify a tapered roller bearing custom design. (5) You need 4+ independent air functions — BP-4P-30-0001 provides 4 passages with the same 30mm bore. The upgrade cost is typically $20–$100 more than BP-2P-30-0001, but it prevents downtime from overloaded seals and bearings.
We design custom rotary joints for any number of passages, pressure, thread type, and mounting style. Free 3D STEP file with every inquiry. Typical custom lead time: 10–14 days.
Request Custom Design →Technical Note: All pressure ratings, speed ratings, and material specifications referenced on this page are based on Begapunk BP-series standard pneumatic rotary joints tested under controlled laboratory conditions. Actual performance depends on operating conditions, media quality, installation practices, and maintenance schedule. For applications outside standard ratings — including high-pressure hydraulic, continuous water immersion, food-grade, or cleanroom environments — consult Begapunk factory engineering before specification. Last updated: June 11, 2026.