---
product_id: 98151965
title: "40HP Gearbox 1-3/8\" Smooth Input & 12 Spline Output Shaft for 4' & 5' Cutters Farmer Bob's Parts 49331"
brand: "farmer bob's parts"
price: "249808 Ft"
currency: HUF
in_stock: true
reviews_count: 1
category: "Farmer Bob's Parts"
url: https://www.desertcart.hu/products/98151965-40hp-gearbox-1-3-8-smooth-input-and-12-spline
store_origin: HU
region: Hungary
---

# 1:1.47 gear ratio precision 4 bolt holes, 5/8" diameter 40HP power output 40HP Gearbox 1-3/8" Smooth Input & 12 Spline Output Shaft for 4' & 5' Cutters Farmer Bob's Parts 49331

**Brand:** farmer bob's parts
**Price:** 249808 Ft
**Availability:** ✅ In Stock

## Summary

> ⚙️ Power your cut with precision and durability—don’t get left behind in the field!

## Quick Answers

- **What is this?** 40HP Gearbox 1-3/8" Smooth Input & 12 Spline Output Shaft for 4' & 5' Cutters Farmer Bob's Parts 49331 by farmer bob's parts
- **How much does it cost?** 249808 Ft with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hu](https://www.desertcart.hu/products/98151965-40hp-gearbox-1-3-8-smooth-input-and-12-spline)

## Best For

- farmer bob's parts enthusiasts

## Why This Product

- Trusted farmer bob's parts brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Robust 40HP Power:** Delivers reliable torque for 4' to 6' rotary cutters, maximizing your equipment’s efficiency.
- • **Precision Mounting:** 4 bolt holes (5/8" diameter) with exact 4-3/4" centers ensure a secure, hassle-free fit every time.
- • **Optimized Gear Ratio:** 1:1.47 ratio engineered for smooth, consistent speed transfer and enhanced cutter performance.
- • **Versatile Compatibility:** Perfectly tailored for Farmer Bob’s 4', 5', and 6' rotary cutters—upgrade your setup with confidence.
- • **Durable Ductile Iron Build:** Heavy-duty construction designed to withstand tough field conditions and extend gearbox lifespan.

## Overview

This 40HP rotary cutter gearbox features a 1:1.47 gear ratio and a robust ductile iron body, designed for seamless mounting with 4 bolt holes (5/8" diameter) spaced at 4-3/4" centers. Compatible with 4', 5', and 6' rotary cutters, it ensures efficient torque transfer and reliable performance, making it a must-have upgrade for professional-grade outdoor power equipment.

## Description

Mounting Pattern (4) 5/8" Holes x 4-3/4" Centers Designed for use with 4 ft., 5 ft. and 6 ft. rotary cutters, this rotary cutter gearbox has 4 bolt holes measuring 5/8" for installment. Gearboxes work to administer a transfer of speed and torque through their internal gear rotation, helping the overall performance of your rotary cutter.

Review: Perfect - This ad showed all of the specifications which saved me time doing the research with other vendors. Received ahead of schedule and my customer is happy. Will definitely use them again.

## Features

- Mounting Pattern (4) 5/8" Holes x 4-3/4" Centers Bolt Holes: 4-3/4" Side to Side 5-1/4" from Bottom of Input Shaft to Base Ratio: 1:1:47
- Rotary Cutter Gear Box
- 40 HP
- Ductile Iron
- Black
- GB40SM12

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Customer Reviews | 5.0 out of 5 stars 5 Reviews |

## Images

![40HP Gearbox 1-3/8" Smooth Input & 12 Spline Output Shaft for 4' & 5' Cutters Farmer Bob's Parts 49331 - Image 1](https://m.media-amazon.com/images/I/51YcO3ZwudL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Perfect
*by D***R on April 18, 2020*

This ad showed all of the specifications which saved me time doing the research with other vendors. Received ahead of schedule and my customer is happy. Will definitely use them again.

## Frequently Bought Together

- 40HP Gearbox 1-3/8" Smooth Input & 12 Spline Output Shaft for 4' & 5' Cutters Farmer Bob's Parts 49331
- uxcell 6010 Deep Groove Ball Bearings 50mm Bore 80mm OD 16mm Thick C3 Open Type Chrome Steel
- uxcell 6304 Deep Groove Ball Bearings 20mm Bore 52mm OD 15mm Thick CN Open Type Chrome Steel 2pcs

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.hu/products/98151965-40hp-gearbox-1-3-8-smooth-input-and-12-spline](https://www.desertcart.hu/products/98151965-40hp-gearbox-1-3-8-smooth-input-and-12-spline)

---

*Product available on Desertcart Hungary*
*Store origin: HU*
*Last updated: 2026-07-07*