EP-BGB8 Light Round Baler Gearbox – 30HP, Two Ratios

EP-BGB8 · 30HP · Ratios 1:1 & 1:1.67 · 18kg

Single Coupling Standard

Both the PTO drive shaft connecting to the input and the coupling connecting to the bale chamber use the same 1 3/8″ Z6 standard. One coupling type in stock covers both ends of the gearbox. For a small-farm operator who does not maintain a comprehensive spare parts inventory, this means a single spare Z6 yoke or sleeve replaces hardware at either shaft position — halving the spare parts requirement for the gearbox drive system.

Reversible Drive Direction

A 90° right-angle bevel gearbox with identical shaft interfaces on input and output can be mounted in the drive chain in either orientation — the shaft labelled "input" in the standard mounting can become the output shaft in a reversed orientation, and vice versa. This flexibility allows the same EP-BGB8 unit to be used in baler designs where the PTO approach direction differs between tractor models, without requiring a separate gearbox variant for each mounting orientation.

Standard PTO Shaft at Both Ends

Both connections — tractor PTO to gearbox input, and gearbox output to bale chamber — use the same standard agricultural PTO drive shaft hardware available from any agricultural supply shop in South Korea, Japan, and Southeast Asia. No custom-machined coupling sleeves or proprietary hub adapters are required at either connection point. For field repair of a failed coupling in a remote location, standard hardware resolves the problem immediately.

OEM Assembly Simplification

Baler OEM manufacturers assembling machines with the EP-BGB8 use the same Z6 coupling yokes and shaft clamps at both positions of the gearbox — reducing the number of unique fastener and coupling types on the assembly line BOM. Fewer unique part numbers, simpler incoming inspection, and a more compact spare parts kit for the customer all follow from the single-interface design.

GGG50 Compact Housing

The EP-BGB8's 18kg housing uses GGG50 nodular cast iron — the same material as the EP-40002's 111kg housing. At 30HP and the smaller gear set dimensions of the EP-BGB8, the housing walls are proportionally thinner, but the same ductile iron material provides the micro-deformation capacity to absorb the intermittent shock loads of small-baler operation: bale density spikes, crop slug ingestion, and the tension variation in the belt-wrap mechanism that occurs as each bale grows.

Differential Module Selection

Config A (1:1, M5.08) uses a coarser module than Config B (1:1.67, M4.0) because at equal speed (1:1), the output gear carries the full input torque without reduction, requiring a larger tooth cross-section. Config B's speed-increase means the output torque is lower than the input torque, allowing the M4.0 smaller-module gear set to operate within its strength limits at the same 30HP input. This module differentiation within a single housing platform is efficient design — both configurations use what they need and nothing more.

Carburised Gears HRC 58–62

Both gear configurations are carburised to 0.8–1.2mm case depth and quench-hardened to HRC 58–62, consistent with the full EP series specification. At 30HP, the cyclic loading of small-baler operation — the bale chamber pressure cycling at roughly one full-density cycle per 30–60 seconds during continuous baling — produces cumulative tooth face contact fatigue that surface hardening resists by providing a hard, wear-resistant tooth face over a tough core.

Baler Environment Sealing

Small balers operate in the same crop dust, chaff, and moisture environment as large commercial balers. The EP-BGB8 output shaft seal uses dual-lip NBR construction with a dust exclusion lip — designed to resist the fine crop particle penetration that is the most common cause of premature bearing contamination in baler gearbox service. The input shaft seal is specified for the oil-bath environment of the gear oil sump on the input side.

100% Load Test Before Dispatch

Every EP-BGB8 unit is bench-tested at full 30HP rated load before dispatch — at the ordered ratio configuration. The test verifies gear mesh contact pattern, bearing temperature, oil seal integrity, and output shaft runout. The compact size of the EP-BGB8 does not reduce the test standard; the same 100% test protocol applied to the EP-40002 applies here, scaled to the EP-BGB8's rated conditions.

Same production standard as the EP-40002 — scaled to 30HP compact duty

Hwang Jae-in Compact Baler OEM Manufacturer · Gimhae, South Gyeongsang, South Korea · 2024

We build compact round balers in the 0.7m format for Korean small farms and export to Vietnam and the Philippines. The EP-BGB8 became our production gearbox 14 months ago — both the 1:1 and 1:1.67 versions are in our product line as the two speed options. Having the same housing for both ratios was the key factor in our decision: one bracket design, one mounting jig, two product configurations. Korea Ever-Power OEM lead time is 4–5 days consistently. In 14 months of production we have had zero gearbox-related customer warranty claims across approximately 140 units shipped.

Yamamoto Keiko Orchard & Rural Property Owner · Aomori Prefecture, Japan · 2024

I manage a 4-hectare apple orchard in Aomori and use a compact round baler on my Kubota B3350 to collect pruning brush and orchard floor grass clippings each season. My original gearbox failed after six seasons. I found the EP-BGB8 through a Korean machinery dealer who ships to Japan. The 1:1 configuration connected directly to my Kubota's Z6 PTO shaft with no adapters — exactly as described. I've now completed one full orchard management season with it. No issues. Oil was clean at the 50-hour change. The weight is fine on the B3350's 3-point hitch. Delivery to Aomori was six days.

Choi Hyeon-a Mixed Small-Farm Operator · Boryeong, South Chungcheong, South Korea · 2024

I grow rice and vegetables on 3.5 hectares and run a 28HP Daedong compact tractor with a small round baler for autumn straw collection — selling the bales to a local mushroom farm. The previous gearbox on the baler was a used unit of unknown origin that finally seized. My agricultural cooperative recommended the EP-BGB8. I ordered the 1:1 ratio version. It arrived in 4 days. My dealer fitted it in half a day. The baler has now completed two full autumn straw collection seasons — about 80 baling hours — with no problems at all. The oil looks fine at each change. For the scale of baling I do, this gearbox is exactly what I needed at a price that made sense.

Supachai Leelawong Agricultural Machinery Dealer · Chiang Mai, Thailand · 2025

I supply compact farm machinery to highland farmers in northern Thailand — coffee and vegetable growers who use small round balers to collect corn stover and biomass between crops. The EP-BGB8 in the 1:1.67 speed-increase configuration is what the baler designs my customers use require — they need the higher output speed for the belt drive geometry. Delivery from Korea Ever-Power to Chiang Mai was 6 days. I ordered a batch of five for stock. Three have been fitted and used for 4–5 months each with no issues reported by customers. The Z6 spline connects to all the Chinese-brand compact tractors in my area without adapters — that was the first compatibility question my customers asked.

Can the EP-BGB8 be used on a 35HP or 40HP tractor?

The EP-BGB8 is rated for 30HP continuous. A 35HP engine tractor typically delivers 29–31HP at the PTO under continuous baling load — within the EP-BGB8's rated capacity. A 40HP engine tractor may deliver 34–36HP at the PTO, which is 13–20% above the EP-BGB8's continuous rating. At this overload level, the M5.08 (Config A) gear set will develop progressive tooth fatigue over multiple seasons rather than failing immediately. For tractors genuinely delivering 35HP+ to the PTO under baling load, Korea Ever-Power recommends confirming PTO HP from the tractor operator's manual before specifying the EP-BGB8. If PTO HP exceeds 33HP under load, contact us — we can advise on whether the EP-BGB8 is appropriate or whether a higher-rated unit is more suitable for your specific baling conditions.

Does the 1:1.67 speed-increase work with a 1000RPM PTO tractor?

No. The EP-BGB8 is rated for 540RPM PTO input only. At 1000RPM input, the 1:1.67 configuration would deliver approximately 1,670RPM at the output shaft — far above the design speed for the gear set and bearings. Gear fatigue, bearing overheating, and oil seal failure would occur rapidly at 1000RPM input. The EP-BGB8 is designed for compact tractor 540RPM PTO applications. If your tractor uses 1000RPM PTO for baling operations, contact Korea Ever-Power for guidance on the appropriate specification.

What gear oil does the EP-BGB8 require?

SAE 90 GL-4 gear oil — approximately 150–200ml fill volume. The EP-BGB8 is dispatched without oil; fill to the oil level plug centre mark before the first operation. Do not run dry even briefly. First oil change at 50 hours; subsequent changes every 200 hours or at the start of each baling season. Given the compact housing volume of the EP-BGB8, oil degradation proceeds faster than in larger-sump units — the 200-hour or seasonal change interval should be adhered to strictly, particularly in warm operating environments.

Is an overload clutch recommended for the EP-BGB8?

Recommended, though less critical than for the high-power EP-40002. Small balers at 30HP operate at lower torque levels and encounter fewer large-obstacle stall events than commercial balers in heavy crop. However, if your baling conditions include materials prone to sudden compaction — tight-rolled straw slugs, wet hay clumps, or crop with high string content — a friction torque limiter set at 120% of rated running torque between the tractor PTO and the EP-BGB8 input is worthwhile protection. It adds minimal cost relative to the gearbox price and eliminates the most common cause of premature gearbox failure in small baler applications.

What warranty and shipping options apply?

12-month warranty from dispatch against manufacturing defects — housing integrity, gear tooth failure within 30HP rated load, bearing failure not caused by oil neglect, and seal defects present at delivery. Not covered: operation above 30HP rated input, 1000RPM PTO input, oil neglect or dry running, or damage from operating without an overload clutch where stall-condition loads are reasonably foreseeable. Shipping: DHL or FedEx for 1–10 units — 3–5 days to Korea and Japan; 5–7 days to Vietnam, Thailand, Malaysia, Indonesia. Sea freight for larger orders (10–18 days). Full export documentation including Certificate of Origin for RCEP and ASEAN preferential tariff applications prepared on every shipment.