Description
Product Overview
The LUBE USA 106291 KP-4R Tubing Coupler is designed to connect 4mm lubrication tubing to an Rc1/8 female threaded port using compatible compression parts. Its compact inline design provides a reliable transition from metric lubrication tubing to a threaded connection within centralized lubrication systems.
This genuine LUBE USA metric tubing coupler is ideal for lubrication system installation, maintenance, and repair on industrial machinery, machine tools, CNC equipment, manufacturing equipment, food processing equipment, and packaging machinery.
Applications
- Connecting 4mm lubrication tubing to Rc1/8 threaded ports
- Main and branch lubrication line installations
- Machine lubrication system repairs and upgrades
- Centralized lubrication systems
- Industrial machinery
- Machine tools and CNC equipment
- Manufacturing equipment
- Food processing equipment
- Packaging machinery
Key Features
- Genuine LUBE USA lubrication component
- Part Number: 106291
- Model: KP-4R
- Designed for 4mm O.D. lubrication tubing
- Straight inline coupling configuration
- M8 × 1.0 compression connection
- Rc1/8 threaded connection
- 25mm overall length
- 14mm hex body for installation
- SUS3604C construction
- Dimensional drawing included for fit verification
Specifications
- Product Type: Tubing Coupler
- Manufacturer: LUBE USA
- Part Number: 106291
- Model: KP-4R
- Tubing Outside Diameter: 4mm
- Thread T1: M8 × 1.0
- Thread T2: Rc1/8
- Overall Length: 25mm
- Hex Size: 14mm
- Material: SUS3604C
- System Type: Metric centralized lubrication system
Compression Parts Required
The LUBE USA 106291 KP-4R tubing coupler is designed for use with compatible compression parts on the 4mm tubing connection. Select the proper compression nut, compression sleeve, and tube insert when required for the tubing material being installed.
Verify the tubing diameter, M8 × 1.0 compression thread, Rc1/8 threaded connection, and compression-part compatibility before installation.
Threaded Connection Configuration
The KP-4R provides a straight transition between 4mm lubrication tubing and an Rc1/8 threaded connection. It is commonly used where lubrication tubing must connect directly to threaded components, manifolds, or equipment ports within a centralized lubrication system.
Ensure the receiving component uses a compatible Rc1/8 thread and tighten the fitting according to the lubrication system manufacturer’s recommendations to help prevent leaks.
Dimensional Drawing
A dimensional drawing is included with this product to help verify the tubing size, thread specifications, overall dimensions, hex size, and installation clearance before ordering.
Review the dimensional drawing and confirm that the KP-4R coupler, 4mm tubing connection, M8 × 1.0 compression thread, Rc1/8 threaded connection, 25mm overall length, and 14mm hex match your lubrication system requirements.
Why a Threaded Tubing Coupler Matters
A properly selected threaded tubing coupler creates a secure connection between lubrication tubing and threaded machine components. Correct fitting selection helps maintain consistent lubricant flow, reduce leakage, simplify maintenance, and improve the long-term reliability of centralized lubrication systems.
Need Help Finding the Correct Coupler?
Not sure if the LUBE USA 106291 KP-4R tubing coupler is the correct fit for your equipment?
Contact Emrick Machinery Sales for assistance selecting the correct LUBE USA tubing couplers, adapters, compression nuts, compression sleeves, tube inserts, junctions, metering units, tubing, and centralized lubrication system components.
