Views: 0 Author: Site Editor Publish Time: 2026-05-11 Origin: Site
DEUBLIN 902 vs 1109 Rotary Joint Selection Guide And Domestic Alternative Solutions
Both DEUBLIN 902 and 1109 series are "pop-off" coolant rotary joints. The 1109 series is the "high-performance version" for higher speeds, while the 902 series is the "standard version" offering better cost-effectiveness.
Feature | 1109 Series (High-Performance) | 902 Series (Economy/Standard) |
|---|---|---|
Core Application | High-speed, high-precision machining centers | Medium/low-speed, general CNC machine tools |
Max Speed | 20,000 RPM | 10,000 RPM |
Max Pressure | 100 bar (~1450 psi) | 100 bar (~1450 psi) |
Max Temperature | 120°C (248°F) | 120°C (248°F) |
Bearing Type | ABEC 7 (ISO P4) angular contact ball bearings | ABEC 1 deep groove ball bearings |
Design Feature | Aluminum housing with cooling fins | Simplified, compact design |
Seal Technology | Balanced mechanical seal (Silicon Carbide) | Balanced mechanical seal (Silicon Carbide) |
Pop-Off Function | Yes (dry-running protection) | Yes (dry-running protection) |
Price Level | Higher | More cost-effective |
Application Scenario | Recommended Series | Reason |
|---|---|---|
Spindle speed > 10,000 RPM | 1109 Series | Prevents bearing overheating and damage |
High-speed milling / high-gloss finishing | 1109 Series | Requires high precision and speed support |
Spindle speed < 8,000 RPM | 902 Series | Fully sufficient, better value |
Heavy cutting / conventional machining | 902 Series | Economical and practical |
When sourcing alternative products, verifying the thread connection is critical.
DEUBLIN Model | Housing Port Thread | Rotor Thread | Series |
|---|---|---|---|
902-121-188 | G 3/8 (BSP, axial) | M16 × 1.5 LH | 902 Series |
902-120-188 | G 3/8 (BSP, radial) | M16 × 1.5 LH | 902 Series |
902-111-165 | 3/8 NPT (axial) | 5/8"-18 UNF LH | 902 Series |
1109-021-188 | G 3/8 (BSP, axial) | M16 × 1.5 LH | 1109 Series |
1109-020-188 | G 3/8 (BSP, radial) | M16 × 1.5 LH | 1109 Series |
1109-024-212 | G 1/4 (BSP, axial) | M16 × 1.5 LH | 1109 Series |
Note: LH = Left-hand thread
Tengzhou, Shandong Province is the main industrial cluster for rotary joints in China. The following four manufacturers offer alternatives for the 902/1109 series:
Manufacturer | Brand | Series Covered | Key Features | Contact |
|---|---|---|---|---|
Shandong Focus Machinery Co., Ltd. | FUXUAN FOCUS | 902/1109 Series | Direct model cross-reference (1109-902-1114); Max pressure 60 bar; OEM/ODM customization | Tel: +86-13869496275 |
Based on official published information from Shandong Focus Machinery, key specifications for their FUXUAN brand alternative are as follows:
Parameter | Specification |
|---|---|
Model | 1109-902-1114 (direct cross-reference to DEUBLIN series) |
Max Speed | ≤ 8,000 RPM |
Max Pressure | ≤ 60 bar (~6 MPa / 870 psi) |
Max Temperature | ≤ 80°C (176°F) |
Media | Coolant, hydraulic oil |
Connection Thread | Customizable (NPT / BSP, etc.) |
Housing Material | Brass |
Certifications | CE, ISO |
The following specifications are common to both series for all quality domestic alternatives:
Seal Technology: Balanced mechanical seal using Silicon Carbide (SiC) for wear resistance and long life
Pop-Off Function: Enables dry-running without seal damage when coolant is not present
Housing Material: Corrosion-resistant anodized aluminum
Rotor Material: Stainless steel
Compatible Media: Water-based coolants or MQL (Minimum Quantity Lubrication / oil mist)
Mounting Options: Axial or radial port configurations available
To ensure you select the correct replacement, follow these steps:
Check your old part number: Locate the full model number on your existing rotary joint (e.g., 902-121-188).
Confirm connection threads: Identify whether it is BSP (G thread) or NPT, and whether it is axial or radial.
Provide operating parameters: Have your max speed, pressure, and media temperature ready.
Request the official cross-reference sheet: Contact the manufacturer directly to obtain their formal product catalog.
Price Reference: Domestic alternatives are typically priced around USD $100-120 per unit,Rotational speed: 8000Rpm to 12000Rpm, offering significant cost savings compared to original imported parts.
If you have a specific old part number or need help matching an interface, feel free to let me know.
Best Regards,
Annie Ben
Focus Machinery Rotary Joint
WeChat 0086 13869496275
Email: annie@focusesmachinery.com
-------------------------------------
Company：Shandong Focus Machinery Co.,Ltd.
Contact: Annie Ben <Sales Director>
Tel/WeChat: 0086-138-6949-6275
WhatsApp/Facebook: 0086-138-6949-6275
Email: annie@focusesmachinery.com
Website: https://focusesmachinery.com/
Made In China Site：https://membercenter.made-in-china.com/
Alibaba: https://china-focus.en.alibaba.com/
Add: No. 988 Xingteng East Road, Shannan Street, Zaozhuang, Shandong, China
