EP-MMP100 Gearbox Menengah Serbaguna — Penggerak Spline Involute 80 hingga 100 KW

EP-MMP100 Medium Multi-Purpose Gearbox — Product Overview

The Mid-Range Commercial Workhorse

The 100–135 HP tractor class powers the bulk of commercial tillage work across Korea, Japan, and Southeast Asia. Farms of 10–50 hectares typically run rotary tillers, beaters, and straw choppers that demand sustained torque under unpredictable field loads — rocky hillside soil, damp clay, dense stubble. The EP-MMP100 medium multi-purpose intermediate gearbox is engineered for exactly this duty cycle: 80–100 KW continuous power through a robust 1.533 : 1 spiral bevel gear set, enclosed in a CNC-machined HT250 cast-iron housing.

Involute Spline on Both Shafts

The defining feature of the EP-MMP100 is its involute spline interface on both input and output shafts. The M2.5Z23 input spline and 8×42×48×8 output spline distribute load evenly across all tooth flanks, reducing peak contact stress by approximately 40% compared to a simple keyway. This spline architecture is what allows the EP-MMP100 to handle sustained 100 KW loads without the fretting and wear that compromise keyway-connected gearbox kultivator putar assemblies within two to three seasons.

Mid-Tier in a Three-Size Family

Korea Ever-Power positions the EP-MMP100 as the mid-tier of its three-size multi-purpose gearbox range — heavier than the entry-level EP-LMP70 light multi-purpose intermediate gearbox (40–70 KW), lighter than the industrial-grade EP-HMP150 (150 KW). For farms that have outgrown a 70 KW gearbox but do not yet need 150 KW capacity, the MMP100 delivers the performance sweet spot at an economical price point.

Spesifikasi Teknis Lengkap

All specifications verified against the Korea Ever-Power engineering drawing for the EP-MMP100 (catalog reference P05). Dimensional values measured at 20°C ambient, no-load condition.

Spline Interface Engineering — Why M2.5Z23 Involute Matters

M2.5Z23 Input Spline Explained

The M2.5Z23 specification describes a 2.5-module, 23-tooth involute spline profile. The involute tooth form — the same geometry used in automotive transmission gears — self-centers under load and distributes torque across all 23 teeth simultaneously. Each tooth carries approximately 4.3% of total torque instead of 100% at a single key. On a gearbox rated for 100 KW at 540 rpm, each involute tooth handles roughly 80 N·m of torque — well within the elastic limit of the hardened spline material. This uniform load sharing is why involute splines survive thousands of hours of cyclic shock loading that would destroy a keyway connection in a fraction of the time.

8×42×48×8 Output Spline

On the output side, the 8×42×48×8 spline provides eight load-carrying teeth with a 42 mm minor diameter and 48 mm major diameter profile. The larger diameter generates higher torque capacity per tooth than the input spline, which is mechanically correct because the output side experiences the amplified torque from the 1.533 : 1 gear reduction. The eight-tooth profile with 8 mm tooth width provides generous overlap for full-face contact even under axial misalignment up to 0.5 mm — a practical tolerance given the real-world alignment accuracy achievable during field installation.

Service Life Advantage

The combined involute spline architecture on both input and output maintains full-contact fit for 3,000+ operating hours under Korean field conditions — roughly three to five times the service life of an equivalent keyway connection at the same torque level. For farms connecting the gearbox to a Poros penggerak PTO, the involute input provides centering accuracy that eliminates vibration at operating speed, protecting both the gearbox bearings and the tractor PTO output bearing from premature fatigue.

Agricultural Bevel Gearbox vs. Planetary Gearbox — Which Suits Tillage?

Buyers sometimes ask whether a planetary gear reducer could replace a right-angle bevel intermediate gearbox for tillage applications. The short answer: right-angle bevel gearboxes are the correct architecture for PTO tillage drives. Here is why:

Dimensi Utama & Antarmuka Pemasangan

Skenario Aplikasi Lapangan

Commercial Rice & Grain Operations

Mid-size Korean grain farms (10–50 hectares) operating 100–135 HP tractors rely on the EP-MMP100 to drive wide rotary tillers (2.0–2.5 meter working width) at sustained full load. The 80–100 KW power rating provides a comfortable torque margin for spring paddy preparation in heavy, waterlogged clay — conditions where lighter gearboxes are at risk of thermal overload during prolonged continuous operation.

Contract Tillage & Custom Hire

Professional contract tillers working 500+ hours per season on diverse client fields demand a gearbox that handles the abuse of rocky soil, sudden stalls, and frequent PTO engagement cycles without premature spline or bearing wear. The EP-MMP100’s involute spline connections on both shafts survive this duty cycle where keyway-connected gearboxes typically need replacement every 12–18 months.

Implement OEM Standard Equipment

Tillage implement manufacturers in Korea and Vietnam specify the EP-MMP100 as factory-standard intermediate gearbox for their 100–135 HP tiller and beater product lines. The CNC-machined housing drops into assembly jigs without adjustment, and the M2.5Z23 involute input mates directly with Korean-standard PTO shaft profiles — eliminating custom adapter costs from the bill-of-materials.

OEM Integration & Fleet Standardization Guide

For Implement Manufacturers

Korea Ever-Power supplies the EP-MMP100 in OEM configurations with custom labeling, private branding, and dedicated engineering support. Our CNC-machined housing dimensions are guaranteed within ±0.02 mm across every production batch, allowing your assembly line to use fixed jigs and datum references without unit-by-unit adjustment. Minimum OEM order quantities start at 50 units per batch with scheduled delivery to match your production calendar.

For Fleet & Cooperative Buyers

Agricultural cooperatives and equipment rental companies standardizing on a single gearbox model across their fleet benefit from the EP-MMP100’s dimensional repeatability. Any unit can replace any other without fitment variation — reducing your spare parts inventory to a single model number and cutting mean-time-to-repair from hours to minutes. Korea Ever-Power offers annual supply contracts with fixed pricing, priority stock allocation, and dedicated account management for fleet buyers ordering 10+ units per year.

Custom Output Adapter Service

If your implement uses a non-standard input spline or flange pattern, Korea Ever-Power can manufacture custom output adapter plates or transition spline couplings to bridge the interface. Adapter engineering is provided at no additional charge for OEM orders above 100 units. Contact our engineering team with your implement’s input shaft drawing for a compatibility assessment.

Installation & Preventive Maintenance

Mounting the EP-MMP100

❶ Verify the implement’s input bore matches the EP-MMP100’s output connector port (Ø164 mm bore, 6-M10 on Ø143 PCD). Insert the output spline (8×42×48×8) into the implement’s mating spline hub.

❷ Secure the 6-M10 output bolts to 65 N·m in a star pattern. Re-check torque after 8 operating hours.

❸ Connect the PTO drive shaft to the M2.5Z23 involute spline input boss. Verify shaft safety guard installation and spline engagement depth.

❹ Isi oli gir (SAE 80W-90 GL-5) melalui lubang ventilasi — kira-kira 2.0 liters sampai minyak mencapai bagian tengah kaca pengintai.

❺ Run a 5-minute idle test at low PTO speed. Verify no abnormal noise, no oil seepage, and smooth output rotation before engaging full field load.

Jadwal Pemeliharaan

Produk Pelengkap & Komponen Penggerak

Build a complete driveline around the EP-MMP100 with Korea Ever-Power companion components:

Poros Penggerak PTO

Matched cardan shafts pre-configured for the M2.5Z23 involute spline input, including full-length safety guards. A properly sized drive shaft eliminates angular misalignment vibration that accelerates bearing wear in both the gearbox and the tractor PTO output.

Pasangan Gearbox Musiman

Jika traktor Anda juga menjalankan gearbox mesin pengepak jerami bundar during straw season or harvester equipment at grain harvest, Korea Ever-Power manufactures dedicated speed-increaser and rear-drive gearboxes rated from 30 to 100 KW. For ancillary machinery such as fertilizer spreaders or seed metering units, a self-locking worm gear reducer provides holding torque without a separate brake mechanism.

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