EP-01-229 Aluminum Gearbox & EP-1ZS-380 Triple-Shaft Bevel Gearbox – Special Application Series

EP-01-229 · AlSi · 1:1.35 · 13kg · Φ25mm output

EP-1ZS-380 · 100HP · Triple shaft · M7.0 · 42.5kg

Power Distribution Mode (most common)

One input shaft receives PTO power from the tractor. Two output shafts simultaneously deliver power to two separate implement drives — each at 1.24× input speed and 50% of input power when loaded equally. Used in large mower-conditioner decks where the PTO input splits to drive both the left and right sections of a wide cutting deck simultaneously, or in combine harvester attachments where a single input drives two parallel threshing elements.

Power Consolidation Mode (less common)

Two input shafts each receive power from separate sources — two PTO connections or a dual-motor setup — and one output shaft receives the combined power. Used in applications where a single implement drive shaft must handle more power than one PTO connection can deliver alone. The 100HP total capacity at M7.0 makes the EP-1ZS-380 suitable for combines and harvesting attachments that exceed a single tractor PTO's safe capacity.

Single-Output Mode (simplified use)

One input shaft active, one output shaft active (the other capped) — the EP-1ZS-380 used as a standard single-path 1:1.24 speed increase bevel gearbox at 100HP. The third shaft position is capped, providing no power contribution. This mode uses only two of the three shaft positions but provides the M7.0 gear strength and 42.5kg housing mass for demanding 100HP single-path applications that no lighter EP gearbox can serve.

EP-01-229: AlSi Die-Cast, M4.5

The EP-01-229 uses AlSi die-cast construction and M4.5 — the same material and module specification as Config A of the EP-RV022(X) (1:1 ratio, M4.5). This shared M4.5 standard means the EP-01-229's gear production tooling is aligned with the EP-RV022(X) production run, enabling the same tooth profile accuracy and heat treatment protocol to apply across both models. The larger 224.25mm housing footprint and 280mm height are the primary dimensional differences from the EP-RV022(X) — the gear quality and surface hardness specification are identical.

EP-1ZS-380: Symmetric T-Section GGG50 Casting

The 42.5kg T-section housing of the EP-1ZS-380 is a GGG50 single casting with three integrated bearing seat bores — one at the primary shaft end and one at each secondary shaft position. Single-casting construction maintains the coaxiality and perpendicularity of all three shaft axes within the casting tolerances of the CNC machining operations, without the accumulated alignment errors that would arise from assembling three separate bearing housings. This precision is critical because any axis misalignment in the three-shaft arrangement produces differential mesh loads between the two secondary gears, accelerating wear on the more heavily loaded mesh position.

Gear Hardening — Both Models

Both the EP-01-229 and EP-1ZS-380 gear sets are carburised to 0.8–1.2mm case depth and quench-hardened to HRC 58–62. For the EP-1ZS-380's three-shaft arrangement, all three bevel gears receive identical heat treatment — the symmetric hardness specification between the two secondary gears is verified during quality control to ensure that neither secondary gear departs from the HRC 58–62 target, which would create a hardness differential and unequal wear rates between the two output positions.

100% Load Test — Both Models

Every EP-01-229 is tested at rated conditions before dispatch. Every EP-1ZS-380 is tested at 100HP full input load with both output shafts loaded equally — verifying that the power split between the two output positions is symmetric within tolerance, that neither gear mesh runs at abnormal temperature, and that all three shaft seals maintain integrity under operating loads. A test with only one output shaft loaded would not verify the symmetric load-sharing characteristic that is the EP-1ZS-380's primary engineering value.

Three-shaft T-section casting and aluminum series on the same CNC production floor

EP-01-229: why does a 16/16 equal tooth count produce a 1:1.35 ratio instead of 1:1 direct drive?

In a standard spur gear pair, equal tooth counts would produce a 1:1 ratio. In a bevel gear pair like the EP-01-229, the ratio is determined not only by tooth count but also by the cone angle relationship between the bevel gears. The 16/16 tooth set at M4.5 uses different cone angles for the input and output bevel gears — the input gear has a steeper cone angle and the output gear has a shallower angle — producing a speed increase from the geometric difference in the effective pitch radii at the bevel gear mesh, even though the tooth counts are equal. This hypoid-like cone geometry is the mechanism by which bevel gearboxes can produce ratios other than 1:1 with equal tooth counts. Contact Korea Ever-Power for the specific cone angle parameters of the EP-01-229 gear set if needed for integration design verification.

EP-1ZS-380: what happens if only one output shaft is loaded and the other is unloaded (free-spinning)?

When one output shaft is loaded and the other turns freely (unloaded), all 100HP input load is carried by the loaded output gear mesh — the unloaded mesh continues to rotate but carries no torque, contributing nothing to the load balance. This asymmetric loading concentrates twice the design tooth load on the loaded mesh, which exceeds the M7.0 gear set's continuous rating in this configuration. For sustained operation, both output shafts should carry reasonably balanced loads. Brief asymmetric loading during start-up or implement engagement sequencing is acceptable; sustained full-load single-output operation is not recommended and should be avoided by design in the implement drive system.

What oil specifications and maintenance intervals apply to both models?

EP-01-229 (aluminum): SAE 80W-90 GL-4 gear oil, approximately 180–220ml. First change at 30 hours; subsequent changes every 150 hours. Lighter viscosity than cast iron units — consistent with the aluminum housing's faster thermal warm-up. Do not use alkaline degreasers on the housing exterior. EP-1ZS-380 (cast iron): SAE 90 GL-4 gear oil, approximately 800–1,000ml for the larger three-shaft housing. First change at 50 hours; subsequent changes every 200 hours. Check all three shaft seals at each oil change. The EP-1ZS-380's large sump volume means oil degradation per operating hour is slower than in compact units — but the 200-hour interval remains appropriate for the 100HP sustained duty cycles this gearbox typically handles.

What warranty and shipping apply?

12-month warranty from dispatch against manufacturing defects. EP-01-229: not covered dry running or alkaline cleaning agent damage. EP-1ZS-380: not covered asymmetric single-output sustained overload or use above 100HP rated input. Both models: oil neglect and dry running are not covered. Shipping: DHL or FedEx 3–5 days to Korea and Japan; 5–7 days to SEA for 1–5 units. Sea freight for larger orders or for the EP-1ZS-380 (42.5kg) where dimensional weight affects courier pricing (10–18 days sea). Full export documentation on every shipment for RCEP and ASEAN tariff applications.