Gearbox Pemotong Putar – EP-RC61T T-Box Splitter, 60 HP / 540 RPM PTO

Model: EP-RC61T  ·  Ratios: 1:1 to 1:1.93  ·  Replaces Omni Gear RC-61T  ·  For 10 ft+ Multi-Deck Mowers

What Is the EP-RC61T Rotary Cutter Gearbox?

The EP-RC61T is a T-configuration splitter gearbox for wide-cut rotary cutters and mowers with two blade decks. It takes one 540 RPM PTO input and distributes power to both outer right-angle gearboxes simultaneously — no second shaft run required. If your machine has a 10 ft or wider cut width with two separate deck sections, this is the replacement gearbox for rotary cutter that holds the system together.

Built to replace the Omni Gear RC-61T, the EP-RC61T uses 20CrMnTi alloy steel gears ground to Grade 5–6 precision (HRC 58–62 surface hardness) and 42CrMo alloy steel shafts (HRC 25–30). Transmission efficiency is 98% at rated load. Noise stays below 68 dB and vibration at ≤ 20 µm.

Four gear ratios (1:1 / 1:1.21 / 1:1.46 / 1:1.93), a 4-bolt 3-1/4″ × 5″ mounting pattern, and 1-3/8″ 6-spline shafts match OEM RC-61T dimensions exactly — zero machining or adapters needed. A reliable choice for dealers, OEM assemblers, and fleet operators sourcing a slasher gearbox at scale.

Specifications

Material & Performance Data

Rotary Cutter Gearboxes – Parts Diagram

Rotary Cutter Gearbox Rebuild Kit

When the housing is intact but internal components show wear, a rebuild kit restores performance at roughly 25–40% of a new unit cost. A standard RC61T kit includes:

• Shaft Seal Set (×3) – Input and two output lip seals. Replace all three together to maintain even sealing pressure across all ports.
• Bearing Kit – Matched sets for all three shaft positions. The centre input shaft bearing carries the highest radial load and should be inspected first.
• Shim Pack – Precision shims to restore bevel gear backlash to ≤ 20 arcmin after bearing replacement.
• Snap Rings & Circlips – Full retaining hardware set. Replace every time shafts are removed.
• Housing Gasket & O-Rings – Required for a leak-free reassembly after any disassembly.

Rebuild trigger: 400–500 operating hours, or at first sign of oil leakage, bearing noise, or increased backlash. Contact us to confirm kit compatibility with your serial range.

Features of the RC61T Right-Angle T-Gearbox

• T-Split Power Distribution – One 1-3/8″ 6-spline input drives two matched outputs simultaneously, eliminating the need for a separate driveline run to each wing deck.
• Four Gear Ratios – 1:1, 1:1.21, 1:1.46, 1:1.93. The 1:1.93 step-up suits outer gearboxes that require higher blade RPM than standard tractor PTO gearbox 540 RPM output provides directly.
• Grade 5–6 Precision-Ground Gears – Backlash ≤ 20 arcmin and vibration ≤ 20 µm reduce deck chatter on wide-cut machines where vibration amplifies with boom length.
• 98% Transmission Efficiency – At 60 HP input, only ~1.2 HP is lost to heat and friction. Lower heat generation also extends oil and seal service intervals.
• OEM Bolt-On Fit – 4-bolt 3-1/4″ × 5″ pattern matches the Omni Gear RC-61T footprint exactly. No machining required.
• Documented Material Standards – Material certs and dimensional drawings available for OEM orders and dealer programs in regulated markets including rotary cutter gearbox Canada supply chains.
• Bearing Brand Flexibility – Standard HRB/LYC/ZWZ/C&U, or SKF / FAG / NSK on request for approved-supplier requirements.

Advantages of Heavy-Duty Rotary Cutter Gearboxes

• Fewer Driveline Components – The T-box replaces a second separate shaft run. Fewer joints means fewer wear points and simpler seasonal maintenance on wide-cut machines.
• Measurable Efficiency Gain – 98% efficiency versus 85–92% in comparable worm-drive configurations. Over a full mowing season, the difference translates to real fuel savings and lower oil temperatures.
• Ratio Range for Multi-Model Coverage – Four ratio variants on one mounting footprint means OEM deck builders can cover a full product range without changing tooling between configurations.
• Consistent Batch-to-Batch Supply – Documented alloy grades and heat treatment protocols ensure each production batch meets the same dimensional tolerances, simplifying incoming inspection for OEM buyers.

Applications of the Agricultural Bush Hog Gearbox

• 10–15 ft Wide-Cut Rotary Cutters & Bush Hog Mowers – The primary use case. One T-box drives both wing decks from a single 540 RPM PTO connection at the tractor.
• Commercial Roadside & Right-of-Way Mowing – Municipal and utility contractors running multi-shift daily cycles need the reliability that 98% efficiency and ≤ 68 dB noise ratings signal.
• Large Pasture & Range Management – A 10 ft two-deck machine cuts roughly 40% more area per hour than a 6 ft single-deck unit at the same ground speed.
• OEM Mower Manufacturing – Equipment builders integrating an agricultural rotary cutter gearboxes supplier-qualified T-box into new wide-cut deck platforms.
• Service & Replacement Parts – Direct fit for machines originally fitted with the Omni Gear RC-61T. Full dimensional interchangeability confirmed.

Confirm tractor PTO speed (540 RPM), shaft spline count, and required outer gearbox input RPM before selecting a ratio variant.

PTO Shaft and Rotary Cutter Gearbox – How They Work Together

• Shaft-to-Gearbox Match – The RC61T input is 1-3/8″ 6-spline. The PTO shaft must match this exactly. A wrong spline count causes fretting wear within 20–30 operating hours.
• Overload Protection – With two decks running from one T-box, blade strikes on either side transmit shock back to the input. A slip-clutch or shear-bolt coupler on the PTO shaft is the first and most effective line of protection.
• Shaft Angle – Keep universal joint operating angles below 15° at all deck lift positions. Exceeding this accelerates needle-bearing wear inside the shaft joints and generates cyclical torque pulses that shorten T-box bearing life.
• Balanced Output Loading – Both output shafts should drive equal blade loads. Significant imbalance between left and right deck loads creates asymmetric radial stress on the T-box input bearings and reduces service life.

Pertanyaan yang Sering Diajukan

Commonly Paired Products

• Poros PTO – 1-3/8″ 6-spline telescoping shafts with slip-clutch overrun, matched to the RC61T’s 60 HP / 540 RPM input.
• Outer Right-Angle Gearboxes – RC-33 or RC-200 class units for each wing deck, receiving drive directly from the RC61T outputs.
• Wide-Cut Rotary Mowers – 10–15 ft dual-deck frames for 50–80 HP tractors.
• RC61T Rebuild Kit – Seals ×3, bearings, shims, snap rings, and gaskets. Restores OEM performance at 25–40% of new unit cost.