Drážková rúrka vývodového hriadeľa série G | Modely G2 až G50

Prehľad produktu

Triangular, lemon, and star tubes all rely on shaped surfaces to transmit torque. The G Series PTO Shaft Spline Tube takes a fundamentally different approach: involute spline teeth machined into the inner and outer tube surfaces interlock like gear teeth, creating a connection with virtually zero rotational backlash. For applications where precision matters as much as strength, from industrial pump drives to marine PTO equipment and heavy-duty generator sets, the G-series spline tube is the engineering choice.

The G Series PTO Shaft Spline Tube range includes nine models: G2, G4, G5, G6, G7, G8, G38, G42, and G50. The G2 to G50 lineup scales from medium-duty agricultural use (220 Nm) through heavy industrial applications (1450+ Nm). Korean operators running precision-speed equipment, high-torque stationary drives, or PTO-powered hydraulic systems frequently specify G-series tubes because the zero-backlash connection eliminates the torsional play that causes vibration and cyclic stress in other tube profiles.

When Spline Tubes Outperform Other Profiles

The advantage of the G Series PTO Shaft Spline Tube over triangular or star profiles shows up most clearly in three scenarios. First, any application where rotational backlash causes problems: pumps that need consistent flow, generators that need stable RPM, or indexing mechanisms that require precise angular positioning. Second, high-cycle fatigue situations where the torsional play in shaped tubes would eventually work-harden and crack the contact surfaces. Third, heavy-torque applications where the spline's many interlocking teeth distribute stress more evenly than the three or six faces of triangular and star tubes.

Hodnoty krútiaceho momentu podľa modelu

Select your G Series PTO Shaft Spline Tube model based on these torque values. The G-series starts where lighter profiles leave off and scales to industrial-class loads.

 

Spline Tube Geometry and Zero-Backlash Design

The defining feature of the G Series PTO Shaft Spline Tube is its involute tooth profile on the telescoping surfaces. Unlike shaped profiles (triangular, lemon, star) that transmit torque through flat or curved face contact, the spline tube uses interlocking teeth that engage with gear-like precision.

How Involute Splines Eliminate Backlash

Each tooth on the inner tube meshes with a corresponding groove on the outer tube. The involute curve of the teeth means the contact point rolls along the tooth face as torque is applied, distributing load evenly across the full tooth depth. When load reverses (as happens cyclically in many pump and generator applications), the teeth on the opposite flank engage immediately with no angular gap. This is the zero-backlash characteristic that makes the G-series essential for precision Hnací hriadeľ vývodového hriadeľa applications.

Spline Tube Dimensions

The G2 model uses a 50 mm outer diameter spline tube with 2.5 mm module teeth and a G35-18 profile designation. Larger models scale proportionally. All G-series spline tubes are cold-drawn for dimensional accuracy, then the spline teeth are broached or hobbed to final tolerance. This two-stage manufacturing process gives the G Series PTO Shaft Spline Tube both the surface finish needed for smooth telescoping and the tooth accuracy needed for zero-backlash engagement.

How to Measure for a G-Series Replacement

Replacing an existing spline-tube shaft with the correct G-series model requires three measurements that are specific to spline profiles. The process is more involved than measuring a triangular or lemon shaft because the tooth dimensions matter:

Measurement 1: Spline Tube Outer Diameter

Use a caliper across the outer tube's major diameter (tooth tip to tooth tip). This identifies the G-series model. Common readings: 50 mm (G2), 57 mm (G4), 64 mm (G5), and so on. If you can't measure directly, count the number of spline teeth visible on the tube end, which also identifies the model.

Measurement 2: Yoke Spline Configuration

Count the teeth on both the tractor PTO stub and the implement input shaft. The G Series PTO Shaft Spline Tube supports all standard yoke spline configurations: 1-3/8" Z6, 1-3/8" Z21, 1-3/4" Z6, 1-3/4" Z20, and metric 8-spline options.

Measurement 3: Closed Length and Travel

Same as any PTO shaft: measure yoke-to-yoke at both working and transport heights. Ensure at least 150 mm of spline tube overlap remains at maximum extension. Because spline tubes have tighter clearances than shaped profiles, maintaining proper overlap is even more important to prevent disengagement under load.

Applications Where G-Series Spline Tubes Excel

The G Series PTO Shaft Spline Tube isn't needed for basic farm implements. It's a specialist product for demanding applications where the zero-backlash and high-rigidity characteristics provide a measurable performance advantage:

• ⚙ PTO-driven hydraulic pumps: constant flow requires constant shaft speed without torsional hesitation
• ⚙ Stationary generator sets: frequency stability depends on eliminating rotational play in the driveline
• ⚙ Marine PTO equipment: saltwater environment demands the tighter clearances that resist corrosion-induced play
• ⚙ Industrial mixing and processing: consistent speed and torque delivery for uniform product output
• ⚙ High-cycle agricultural use: implements that reverse load direction hundreds of times per minute benefit from zero backlash

Connecting to Your Tractor: Step-by-Step

Installing the G Series PTO Shaft Spline Tube follows the same general procedure as other PTO drivelines, but the spline tube requires a bit more care during initial engagement:

1. Apply anti-seize compound to both PTO stub splines and implement input splines. For spline tubes, also apply a thin coat of grease to the tube teeth before first assembly.

2. Slide the tractor-end yoke onto the PTO stub. The push pin or locking mechanism should click securely. Do not force it.

3. Rotate the inner spline tube slightly while pushing it into the outer tube. The spline teeth need to align before they'll engage. Once aligned, the tube slides in smoothly.

4. Attach safety chains and confirm shield rotation. Check tube overlap at both working and transport heights.

Sprievodné produkty

G-Series and Gearbox Compatibility

The G Series PTO Shaft Spline Tube connects to an poľnohospodárska prevodovka or industrial gearbox on the implement side. For precision applications like hydraulic pumps or generators, the gearbox itself should be specified for low backlash to preserve the advantage of the spline tube. Our engineering team can recommend compatible gearbox models when you order.

Náhradné diely

Spline tube pairs (inner + outer), cross-bearing kits sized for each G-model, forged yokes in all spline configurations, and safety shields are available individually from our Kórejský katalóg. G-series tubes require more precise manufacturing than shaped profiles, so replacement tubes should always be sourced from the original manufacturer to ensure tooth compatibility.

Why Specify G-Series Spline Tubes

• ✧ Zero rotational backlash through involute spline tooth engagement
• ✧ Nine models from G2 to G50 covering 220 Nm to 2200+ Nm maximum permissible torque
• ✧ Cold-drawn and broached/hobbed tubes for both dimensional accuracy and tooth precision
• ✧ Suited for industrial, marine, and precision agricultural applications beyond standard farm use
• ✧ Compatible with all standard yoke spline configurations (inch and metric)
• ✧ CE, ISO 9001, TS/16949 certified with material test certificates per production batch
• ✧ Factory-direct pricing 30 to 40 percent below equivalent European spline-tube PTO shafts

Často kladené otázky

What's the practical difference between a G-series spline tube and an S-series star tube?

The star tube has six to eight shaped lobes, while the G-series spline tube has many more interlocking involute teeth (similar to a gear). The spline tube provides zero backlash and higher torsional rigidity. The star tube is more tolerant of debris and easier to field-service. For standard farming, star is sufficient. For precision or industrial PTO work, specify G-series.

Can I use a G Series PTO Shaft Spline Tube on a standard farm tractor?

Yes, but it's typically over-specified for basic farm implements. The G-series costs more than T, L, or S-series equivalents. Unless your application specifically benefits from zero backlash or maximum torsional rigidity, a shaped-tube profile is more cost-effective.

Do spline tubes require different lubrication than triangular or lemon tubes?

Same NLGI #2 EP grease, but apply it more frequently (every 40 hours rather than 50) because the tighter tooth clearances are less tolerant of contamination. Clean the overlap zone thoroughly before re-greasing. Foreign particles trapped between spline teeth accelerate wear faster than in open-profile tubes.

Are the G Series PTO Shaft Spline Tube dimensions compatible with Walterscheid or Bondioli spline shafts?

Yes. Our G-series tubes follow the same involute spline standards (DIN 5480 / ISO 4156). Tube outer diameters and tooth modules match the European equivalents, making them drop-in replacements at a lower price point.

What happens if the spline teeth wear out?

You'll notice rotational play developing between the inner and outer tubes, similar to gear backlash. Replace the tube pair. Unlike shaped profiles that can tolerate some wear before affecting performance, spline tubes should be replaced promptly once backlash appears because the precision benefit is lost.

Can I add a torque limiter to a G-series spline shaft?

Yes. SA ratchet, SB shear bolt, and SFF friction clutch options are all compatible. For industrial pump applications, the SFF friction clutch is recommended because it auto-resets without requiring manual intervention.

Recenzie zákazníkov

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Seo Hyun-woo, Hydraulic Pump Installer, Gyeonggi-do (spring 2025)

"G6 spline shaft driving a PTO hydraulic pump on a 90 HP tractor for an irrigation system. The zero-backlash connection eliminated the pressure pulsation we had with the old star-tube shaft. Flow consistency improved noticeably. Exactly what we needed for this application."

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Kim Tae-won, Generator Service Company, Busan (late 2024)

"We supply PTO generator sets for emergency power at construction sites. The G5 spline shaft gives stable RPM transfer that keeps the generator frequency within tolerance. Previous shafts with lemon tubes caused frequency drift at partial load. The G-series fixed it."

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Ryu Dong-gyu, Marine Equipment Dealer, Incheon (early 2025)

"Marine PTO applications require tight tolerances because saltwater corrosion eats into clearances fast. The G-series spline starts with essentially zero clearance, so it takes much longer for corrosion to create problems. We've standardized on G4 and G6 for our fishing vessel auxiliary drives."

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Baek Ji-hoon, Industrial Mixer Operator, Chungcheongbuk-do (mid 2024)

"PTO-powered compost mixer running 8 hours a day. The G5 spline tube handles the constant torque reversals when the mixing paddles cycle through the material. After six months of daily use, no detectable backlash. The spline teeth still look clean and unworn."

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Jo Min-seo, Heavy Equipment Dealer, Daejeon (fall 2024)

"I stock the G-series for industrial customers alongside the T and S-series for farm use. The G-series moves slower because it's a niche product, but every customer who buys it knows exactly why they need it. Zero complaints, zero returns. The price undercuts Walterscheid equivalents by about 35%."

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