What raw materials can Ruitu bromine extraction systems process?

Our bromine extraction systems are designed for seawater, bitter brine, salt lake brine, oilfield water, bromine-bearing industrial wastewater and concentrated brine from desalination plants. The process route is selected only after we review a laboratory analysis of your feed.

Do you supply single machines or complete plants?

Both. We supply individual machines such as salt washers, roller crushers, dryers, vibrating screens, belt conveyors and hot air furnaces, and we also deliver complete turnkey lines under an EPC contract.

What is included in your EPC service?

Water quality testing, site selection support, process design, project launch preparation, equipment manufacturing and procurement, packing and shipping, installation and commissioning, operator training, finished product production guidance, and output buy-back or decommissioning support where agreed.

Can your salt washing equipment produce food-grade salt?

Our salt washing machinery is used for both food-grade and chemical-grade salt. The achievable grade depends on the crude salt composition and the standard that applies in your market, so we design the washing, crushing, drying and screening stages around your target specification.

How do you support overseas installation?

Our engineers can be dispatched to site for installation and commissioning, train your operators, and stay involved until the line produces finished product at the designed daily capacity.

How do I start a project with Ruitu?

Send us your raw material analysis, target daily capacity, product specification and site information by email or phone. Our technicians will prepare a preliminary budget estimate and an economic benefit analysis based on your budget and expected output.

Custom Flexible Screw Conveyor Connecting Drive Shaft (Auger Shaft Head) Factory, Service

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Custom Flexible Screw Conveyor Connecting Drive Shaft (Auger Shaft Head) Factory, Service

Brand: Ruitu Automation

Origin: China

Application

As a core power transmission fitting, it is widely compatible with flexible screw conveyors and vehicle-mounted grain suction machines. It applies to agriculture, salt chemical and building material industries, enabling stable multi-directional conveying of grain, raw salt, chemical powder and various bulk materials.

Advantages

Outstanding torsional strength, excellent wear resistance and tight dimensional tolerance. It has strong interchangeability, long service life and supports flexible customization for diverse industrial working conditions.

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Product Description

Product Overview

Our flexible screw conveyor connecting drive shaft (also called auger tail shaft or power transmission shaft head) is a core power transmission component specially developed for flexible screw conveying equipment (flexible auger, vehicle-mounted grain suction machine). As the key connecting part between the drive unit (motor & reducer) and the internal spiral conveying spring, it transmits stable rotary torque to drive the spiral blade to rotate continuously, thus realizing efficient horizontal, inclined or vertical conveying of bulk granular and powdery materials.

Precision-machined with strict production standards, this drive shaft features high torsional strength, excellent wear resistance and strong dimensional interchangeability, and can perfectly replace original parts of mainstream flexible augers on the market. It is widely used in agriculture, salt chemical engineering, building materials, food processing and other industries, providing reliable power transmission support for various bulk material handling systems. For salt chemical scenarios such as crude salt, washed salt and bromine salt conveying, stainless steel models are available to meet anti-corrosion requirements.

Detailed Technical Parameters

Parameter Item	Standard Specification	Customization Range
Product Model	RT-SS Series	Non-standard customization supported
Main Material	45# Carbon Steel (Default)	SS304, 40Cr Alloy Steel
Surface Treatment	Precision Polishing + Anti-rust Oil	Chrome plating, passivation
Total Shaft Length	320–520mm	280–650mm
Large End Outer Diameter	50–76mm	40–90mm
Small End Outer Diameter	25–40mm	20–50mm
Pin Hole Diameter	10–14mm	8–20mm
Keyway Width	5–12mm	Customized on demand
Dimensional Tolerance	IT7–IT8 Grade	—
Surface Hardness	HRC 28–35 (Quenched & Tempered)	HRC 35–45 (For heavy duty)

Structural Design & Core Advantages

The product adopts an integral stepped shaft structure, which optimizes the force distribution of each section under torsional load and avoids stress concentration at the step transition. The large-diameter head section is designed with two radial through holes of different sizes: the main hole is used for installing the fixing pin of the spiral spring blade, and the auxiliary hole is used for positioning and locking, which effectively prevents the spiral body from loosening and falling off during high-speed rotation. The small-diameter power end is processed with a standard flat keyway, which fits closely with the output shaft of the reducer to ensure zero slip during high-torque transmission. The end of the shaft body is reserved with an auxiliary positioning hole to improve assembly accuracy and disassembly efficiency.

1. Superior Mechanical Strength

The blank is formed by integral hot forging, with compact internal structure and no porosity or crack defects. After quenching and tempering heat treatment, it has excellent comprehensive mechanical properties and can withstand long-term heavy-load continuous operation without fracture or deformation.

2. High-precision Interchangeability

All dimensions are processed by CNC lathe with secondary fine turning, and the dimensional tolerance is strictly controlled within IT7–IT8 grade. It is fully compatible with conventional flexible screw conveyors of 100mm–160mm diameter on the market, and can be directly installed and replaced without secondary modification.

3. Long Service Life

The surface is mirror-polished to reduce the friction coefficient with matching parts, and optional surface strengthening treatment such as chrome plating can further improve wear resistance and corrosion resistance, extending the service life by more than 30% compared with ordinary shafts.

4. Flexible Customization Service

We support fully customized production according to customer’s drawings or actual equipment parameters, including non-standard dimensions, special hole positions, special materials and surface treatment schemes.

Standard Specification Selection Table

Model Number	Total Length	Large End OD	Small End OD	Main Pin Hole Diameter	Adapted Conveyor Diameter	Recommended Material
RT-SS-100	320mm	50mm	25mm	10mm	100mm (4 inch)	45# Carbon Steel
RT-SS-120	380mm	60mm	30mm	12mm	120mm (5 inch)	45# Carbon Steel
RT-SS-140	450mm	65mm	35mm	12mm	140mm (5.5 inch)	45# Carbon Steel / SS304
RT-SS-160	520mm	76mm	40mm	14mm	160mm (6 inch)	45# Carbon Steel / SS304
RT-SS-Custom	Customized	Customized	Customized	Customized	Non-standard size	Optional

Material Performance Comparison

Material Grade	Tensile Strength	Recommended Application Scenario
45# Carbon Steel (Quenched & Tempered)	≥600 MPa	Grain, sand, coal, general bulk materials
SS304 Stainless Steel	≥520 MPa	Raw salt, washed salt, bromine salt, chemical powder, food materials
40Cr Alloy Steel	≥785 MPa	Heavy-duty, 24h continuous operation, high-strength working conditions

Application Fields & Adaptation

Industry Category	Typical Conveying Materials	Adapted Equipment Type
Agricultural Machinery	Wheat, corn, rice, feed, seeds	Vehicle-mounted grain suction machine, portable flexible auger
Salt & Chemical Industry	Crude salt, washed salt, bromine salt, chemical powder, fertilizer	Flexible screw conveyor, small bulk material conveying system
Building Materials	Cement, dry mortar, sand, lime powder	Construction site small conveying equipment, mortar conveying line
Food Processing	Flour, starch, grain granules, sugar	Food-grade flexible conveying production line

Frequently Asked Questions (FAQ)

Q1 What is the primary function of this flexible screw conveyor drive shaft?

It serves as the critical power transmission connection between the drive motor/gear reducer and the internal spiral conveying spring, delivering stable rotary torque for smooth conveying across horizontal, inclined, or vertical setups.

Q2 Can this drive shaft replace factory components on standard augers?

Yes. Precision-engineered to IT7–IT8 tolerance levels via CNC turning, the RT-SS series offers strict dimensional interchangeability and directly fits standard 100mm to 160mm flexible screw conveyors without secondary tooling or modifications.

Q3 Which material option is best suited for corrosive or chemical applications?

For corrosive environments such as crude salt, washed salt, chemical powders, or food processing lines, SS304 stainless steel is highly recommended. For abrasive, heavy-duty industrial work, 40Cr alloy steel or quenched 45# carbon steel is preferred.

Q4 How does the shaft prevent detachment during high-speed rotation?

The large-diameter head is engineered with dual radial through holes: a primary hole for fixing pins and a secondary auxiliary hole for locking, ensuring the conveying spiral remains tightly anchored even under peak rotational speed and heavy load.

Q5 Do you offer custom dimensions, pin hole patterns, or special keyways?

Yes. Non-standard configurations (RT-SS-Custom) are fully supported. We can manufacture customized shaft lengths (280–650mm), varying outer diameters, customized keyways, and specific hole placements according to technical drawings.

Q6 What heat treatment is applied to ensure torsional strength?

The integral hot-forged blank undergoes comprehensive quenching and tempering heat treatment, achieving a surface hardness of HRC 28–35 (up to HRC 45 for heavy-duty grades), eliminating internal porosity and preventing breakage under high-torque operation.