Leather Drumming Paddle Assembly

Product Specifications

Technical details and manufacturing context for Leather Drumming Paddle Assembly

Definition

The Leather Drumming Paddle Assembly is a mechanical component used in industrial leather tanning drums. Its primary function is to agitate hides and distribute tanning chemicals uniformly throughout the drum volume. The assembly consists of paddle blades mounted on a shaft that connects to the drum's drive system. As the shaft rotates, the blades create turbulent flow, ensuring that tanning agents penetrate hides consistently while preventing clumping and promoting efficient mixing. This action is critical for achieving uniform leather quality and reducing processing time in tanning operations.

The assembly is typically manufactured from corrosion-resistant materials such as Stainless Steel 316L, Polypropylene, and EPDM rubber, which withstand the harsh chemical environment of tanning liquors. Key parameters include a blade diameter of 800–1200 mm, shaft diameter of 60–100 mm, maximum rotational speed of 120–180 rpm, material thickness of 8–12 mm, and total weight of 150–250 kg. The assembly is designed to operate within a pH range of 2–12 (per ISO 175), temperatures from 0–80°C, and pressures of 1.0–1.6 MPa. Tolerances are ±0.5 mm (ISO 2768-m), and surface finish is Ra 1.6–3.2 μm (ISO 1302). The mounting type is flanged, bolted to the drum shaft, and the material grade for stainless steel components is SS316L (ASTM A240).

These assemblies are supplied to tanning machinery OEMs and as replacement parts for maintenance. When selecting or verifying a paddle assembly, it is essential to confirm model-specific values for dimensions, materials, and standards with the legal manufacturer or supplier, as the listed ranges are for reference only. Proper installation and adherence to operating limits are necessary to ensure reliable performance and avoid premature failure.

Working Principle

The paddle assembly operates by rotating blades within the tanning drum. The shaft, driven by the drum's motor, spins the blades at speeds up to 120–180 rpm. This rotation generates turbulent flow, which mechanically agitates the hides and disperses tanning chemicals evenly throughout the drum volume. The blade design and rotational speed are selected to achieve thorough mixing without damaging the hides. The turbulent action prevents clumping of hides and ensures consistent chemical penetration, which is essential for uniform leather quality. The assembly's materials and surface finish are chosen to resist chemical attack and minimize buildup, maintaining efficiency over time.

Common Materials

Stainless Steel 316L, Polypropylene, EPDM Rubber

Technical Parameters

Parameter	Typical range	Notes & selection driver
Blade DiameterRequired	800–1200 mm	Overall diameter of paddle blade assembly
Shaft DiameterRequired	60–100 mm	Mounting shaft diameter for drum connection
Maximum RPMRequired	120–180 rpm	Maximum safe rotational speed
Material ThicknessRequired	8–12 mm	Thickness of paddle blade material
Weight	150–250 kg	Total assembly weight
Chemical Resistance RatingRequired	pH 2–12 pH range	Compatible pH range for chemical exposureISO 175
Operating Temperature	0–80 °C	Above 80°C may degrade seals
Tolerance	±0.5 mm	Ensures proper fit in drum shaftISO 2768-m
Surface Finish	Ra 1.6–3.2 μm	Smooth finish reduces chemical buildupISO 1302
Mounting Type	Flanged	Bolted to drum shaft
Material Grade	SS316L	Corrosion-resistant for tanning chemicalsASTM A240

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Paddle Blade Part
Primary mixing surface for chemical distribution

Material: Stainless Steel 316L
Mounting Hub Part
Connects paddle to rotating shaft

Material: Stainless Steel 316L
Wear Sleeve Optional Part
Protects shaft from chemical corrosion

Material: EPDM Rubber
Fastening Bolts Part
Secures paddle assembly to mounting hub

Material: Stainless Steel 316L

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Leather Drumming Paddle Assembly.

Manufacturers of Leather Drumming Paddle Assembly

Manufacturer profiles associated with Leather Drumming Paddle Assembly.

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Frequently Asked Questions

What materials are used in the paddle assembly?

The assembly is available in Stainless Steel 316L, Polypropylene, and EPDM rubber, as listed in the directory. These materials are chosen for corrosion resistance to tanning chemicals. Confirm the specific material for your application with the supplier.

What are the key dimensions and operating limits?

Typical blade diameter is 800–1200 mm, shaft diameter 60–100 mm, material thickness 8–12 mm, and weight 150–250 kg. Maximum rotational speed is 120–180 rpm. Operating temperature range is 0–80°C, pressure 1.0–1.6 MPa, and pH range 2–12. Always verify these values for the specific model.

How is the assembly mounted to the drum?

The assembly uses a flanged mounting type, bolted to the drum shaft. The shaft diameter and tolerance (±0.5 mm) ensure a proper fit. Installation should follow the manufacturer's guidelines to avoid misalignment.

What maintenance signals indicate wear or failure?

Signs of wear include increased vibration, unusual noise, reduced mixing efficiency, or visible damage to blades. If operating temperature exceeds 80°C, seals may degrade. Regular inspection of blade thickness and surface finish is recommended. Replace worn parts promptly to avoid process disruption.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

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pressure:	Atmospheric to 2 bar
flow rate:	Up to 500 L/min agitation capacity
temperature:	5°C to 80°C
slurry concentration:	Up to 40% solids by weight

Product Specifications

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