Rotating Turret for Rotary Tablet Presses

Product Specifications

Technical details and manufacturing context for Rotating Turret

Definition

The rotating turret is the core rotating assembly in an industrial rotary tablet press. It consists of a circular structure that rotates around a central axis while carrying multiple sets of upper and lower punches and corresponding dies. As the turret rotates, each punch-die set passes through various stations including filling, compression, and ejection, allowing for high-speed, continuous tablet manufacturing. The turret's precision rotation ensures accurate alignment and timing between all press components.

Typical turrets are manufactured from alloy steel, stainless steel, or tool steel, with material grades such as 40Cr to 42CrMo (per GB/T 3077) and surface hardness in the range of HRC 50–60. The number of stations can range from 16 to 61, which determines the tablet output per revolution. Maximum tablet diameter ranges from 13 to 25 mm, and turret speed can reach 30 to 80 rpm, yielding outputs from 10,000 to 300,000 tablets per hour. Preload force is typically 10 to 100 kN, while main compression force ranges from 40 to 300 kN. Punch penetration depth is adjustable between 5 and 20 mm. Turret diameter varies from 300 to 1200 mm, and weight from 200 to 3000 kg. Runout tolerance is ±0.01 mm (per ISO 1101), and operating temperature is 10 to 40 °C.

These values are reference ranges for directory purposes; actual specifications must be confirmed with the legal manufacturer or supplier for a specific model and application. The turret's design and precision directly affect tablet weight, thickness, and hardness consistency.

Working Principle

The turret rotates continuously or intermittently, driven by a central shaft connected to the press's main drive system. As it rotates, the punch-die sets mounted on the turret pass through: 1) Filling station where powder is fed into dies, 2) Compression station where upper and lower punches compress the powder into tablets, and 3) Ejection station where finished tablets are pushed out. The rotation speed determines production rate, while turret precision ensures consistent tablet weight, thickness, and hardness.

Common Materials

Alloy Steel, Stainless Steel, Tool Steel

Technical Parameters

Parameter	Typical range	Notes & selection driver
Number of Stations	16–61	Determines tablet output per revolution
Max Tablet Diameter	13–25 mm	Larger diameters require fewer stations
Max Turret Speed	30–80 rpm	Higher speeds reduce dwell time
Max Output	10000–300000 tablets/h	Depends on stations and speed
Preload Force	10–100 kN	Ensures die compaction
Main Compression Force	40–300 kN	Critical for tablet hardness
Punch Penetration Depth	5–20 mm	Adjustable for fill depth
Turret Diameter	300–1200 mm	Affects machine footprint
Turret Weight	200–3000 kg	Heavier turrets improve stability
Material Grade	40Cr–42CrMo	Hardened and tempered for wear resistanceGB/T 3077
Surface Hardness	HRC 50–60	Critical for punch guide wear
Runout Tolerance	±0.01 mm	Ensures uniform tablet weightISO 1101
Operating Temperature	10–40 °C	Above 40°C may affect lubrication

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

Turret Body
Main structural frame that holds all punch-die sets and rotates around central axis

Material: Alloy Steel
Punch Holders Part
Precision mounting points for upper and lower punches, ensuring proper alignment during rotation

Material: Tool Steel
Die Table Part
Circular plate containing die pockets where tablet compression occurs

Material: Hardened Steel
Central Shaft Part
Main rotating shaft that transmits torque from drive system to turret

Material: Alloy Steel
Bearing Assembly
Precision bearings that support turret rotation with minimal friction and vibration

Material: Bearing Steel

Manufacturers of Rotating Turret

Manufacturer profiles associated with Rotating Turret.

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Frequently Asked Questions

What is the function of a rotating turret in a tablet press?

The rotating turret holds multiple punch and die sets and rotates them through filling, compression, and ejection stations, enabling continuous tablet production.

What materials are commonly used for turrets?

Common materials include alloy steel, stainless steel, and tool steel, with grades like 40Cr to 42CrMo and surface hardness HRC 50–60.

How does turret speed affect production?

Higher turret speeds increase output but reduce dwell time at compression, which may affect tablet hardness. Speeds range from 30 to 80 rpm.

What tolerances are critical for turret performance?

Runout tolerance is typically ±0.01 mm (per ISO 1101), which ensures uniform tablet weight and proper alignment of punches and dies.

Data Basis

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

Preliminary Technical Classification

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pressure:	Up to 100 kN per compression station (typical for high-speed tablet presses)
other spec:	Maximum turret speed: 60-100 RPM (depending on press model), Turret indexing accuracy: ±0.05°
temperature:	Ambient to 80°C (typical pharmaceutical processing range)

Rotating Turret

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