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Rod end FLURO EA 20 – M20x1.5 male, right-hand, steel/steel bearing (uniball)
- Rod end FLURO EA 20: M20x1.5 right-hand male thread, 20 mm bore, load capacity 62.5 kN static / 30.0 kN dynamic, steel/steel bearing. 1 pc.
FLURO EA 20 Rod End – M20x1.5 Right-Hand Male Thread, 20 mm Bore, Steel/Steel Bearing
FLURO EA 20 is a rod end (also referred to as a rose joint, heim joint, spherical rod end, or threaded uniball) featuring an M20x1.5 right-hand external (male) thread and a 20 mm ball bore diameter. It supports a static load of up to 62.5 kN and a dynamic load of up to 30.0 kN. It operates on a steel/steel spherical plain bearing that requires lubrication.
This rod end belongs to the EA series manufactured by the German company FLURO-Gelenklager GmbH, built to dimension series E in accordance with DIN ISO 12240-4. This series is designed for high loads with alternating direction and for connections with limited installation space – series E rod ends are narrower than series K rod ends.
In size 20, the standard version of the EA series features an M20x1.5 fine-pitch thread (1.5 mm pitch) rather than a standard M20 thread with a 2.5 mm coarse pitch. Therefore, pay attention to the thread pitch when selecting a nut or an internally threaded rod.
Key Specifications at a Glance
- Manufacturer: FLURO-Gelenklager GmbH (Germany)
- Manufacturer designation: EA 20
- Type: external (male) thread rod end, with steel/steel bearing
- Thread: M20x1.5 (fine pitch, 1.5 mm pitch), right-hand
- Ball bore diameter: 20 mm
- Static load rating: 62.5 kN
- Dynamic load rating: 30.0 kN
- Sliding pair: steel / steel
- Lubrication: requires lubrication, DIN 71412 grease nipple
- Standard: DIN ISO 12240-4, dimension series E
- Sold as: 1 piece
Technical Specifications – FLURO EA 20
| Parameter | Value (Metric) | Value (Imperial) |
|---|---|---|
| Thread (G) | M20x1.5 male, right-hand, fine pitch | – |
| Ball bore diameter (d) | 20 mm | 0.79" |
| Outer head diameter (D) | 53 mm | 2.09" |
| Ball / inner ring width (W) | 16 mm | 0.63" |
| Housing / outer ring width (T) | 13 mm | 0.51" |
| Center of bore to end of shank (L) | 78 mm | 3.07" |
| Overall length | 104.5 mm | 4.11" |
| Thread length (GM) | 43 mm | 1.69" |
| Tilt angle | 9° in each direction (18° total) | – |
| Maximum static load (C0) | 62.5 kN | 14051 lbf |
| Maximum dynamic load (C) | 30.0 kN | 6744 lbf |
| Weight | 320 g | 0.71 lb |
| Lubrication | requires lubrication, DIN 71412 grease nipple | – |
Construction and Materials
Housing (body with threaded shank)
The size 20 housing is forged from C45 (AISI 1045) quenched and tempered steel and zinc-plated for corrosion protection. In the EA series, housings up to and including size 10 are machined from free-cutting steel, while from size 12 upwards they are forged from C45 quenched and tempered steel.
Spherical plain bearing
A steel/steel spherical plain bearing of type GE..E operates inside the housing. This sliding pair handles high loads with alternating direction well, but requires lubrication.
Lubrication
The rod end features a hydraulic grease nipple conforming to DIN 71412, through which grease is replenished.
Applications
EA series rod ends are used in linkages that transmit high loads with alternating direction while accommodating angular misalignment. Typical applications for the M20x1.5 size include:
- hydraulic cylinders,
- lever systems and linkages in machinery,
- construction, agricultural, and industrial machinery,
- heavy tubular structures, tie rods, and bracing,
- connections with limited installation width.
Selecting a rod end for a specific joint must account for actual operating loads and an appropriate safety factor – this is the responsibility of the design engineer or installer.
Installation Guidelines
- A 20 mm diameter bolt or pin passes through the ball bore.
- Secure the threaded shank using an M20x1.5 (fine-pitch) jam nut – a standard M20 nut with a 2.5 mm pitch will not fit.
- The threaded shank should be engaged to a minimum depth of 1.5 times the thread diameter, i.e., at least 30 mm.
- The steel/steel bearing requires lubrication – do not operate it dry.
- To utilize the full tilt angle, use conical misalignment spacers on both sides of the ball.
Frequently Asked Questions
What thread does the FLURO EA 20 rod end have?
The FLURO EA 20 rod end has an M20x1.5 external (male), fine-pitch, right-hand thread. The thread length is 43 mm.
What bolt size fits the EA 20 bore?
The ball bore diameter is 20 mm, so it accommodates a 20 mm diameter bolt or pin.
What load can the FLURO EA 20 handle?
The maximum static load rating is 62.5 kN (14051 lbf), and the dynamic load rating is 30.0 kN (6744 lbf).
Does the EA 20 rod end require lubrication?
Yes. The rod end operates on a steel/steel bearing that requires lubrication. The rod end features a hydraulic grease nipple conforming to DIN 71412, through which grease is replenished.
What is the difference between EA 20 and EA 20 D?
EA 20 has a steel/steel bearing that requires lubrication, whereas EA 20 D has a maintenance-free bearing. The mounting dimensions of both versions are identical.
What is the difference between EA 20 and EAL 20?
EA 20 has a right-hand thread, whereas EAL 20 has a left-hand thread. Using a pair of right-hand and left-hand rod ends on a single linkage rod allows you to adjust its length without disassembly.
What is the tilt angle of the EA 20 rod end?
The ball tilts 9° in each direction, for a total of 18°.
What materials is the FLURO EA 20 made of?
The housing is forged from C45 (AISI 1045) quenched and tempered steel and zinc-plated, and a steel/steel spherical plain bearing of type GE..E operates inside the housing.
Is the price for a single piece?
Yes, the price is for 1 piece of the FLURO EA 20 rod end.