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Fine Crushing

Double Roller Crusher for Fine Crushing & Sand Making

Double roller crushing equipment for medium and fine crushing, particle-size control and manufactured sand workflows.

Series and models
2PG400x2502PG610x4002PG450x5002PG600x7502PG750x5002PG800x6002PG900x12002PG1000x700
Models and capacity ranges are listed as selection references. Final configuration should be confirmed by feed size, material hardness, moisture, roller surface and required discharge size.

Tables show common size ranges. Final configuration is checked by material hardness, mud and moisture, capacity, product size, upstream / downstream equipment and site layout.

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PSJ double roller crusher for sand making and fine crushing
Selection Guide

Choose by duty, not by model name

Use this page to check feed materials, operating limits, model ranges, line integration, wear parts and inquiry data.

01

Best-fit Feed Materials

Hard materials
  • River pebble / cobble
  • Granite
  • Basalt
  • Quartz sand
Medium-soft materials
  • Limestone
  • Coal
  • Gypsum
  • Weathered stone
02

Operating Limits

  • Feed size is limited; large raw stone normally needs jaw primary crushing before entering the roller crusher.
  • Hard and abrasive stone can wear roller skins faster during long continuous production.
  • Final sand grading depends on feed gradation, roller surface, gap setting and downstream screening.
03

Model Range & Key Data

Common PSJ / 2PG specification references

Common modelsCapacity referenceTypical use
The following ranges are for common model reference only. Actual capacity depends on material hardness, moisture, feed size, roller surface and roller-gap setting.
04

Line Integration

Used after primary crushing for medium and fine crushing, sand making particle control or pre-washing fine crushing sections.

Jaw crusherVibrating feederBelt conveyorSHY washing, dewatering and recovery machineVibrating screen
05

Wear Parts & Service Spares

Roller wear parts
  • Roller shell / roll skin
  • Smooth roller surface
  • Toothed roller surface
  • Grooved roller surface
Adjustment and drive parts
  • Spring adjustment device
  • Bearing-related parts
  • Reducer and coupling-related parts
  • V-belt or pulley parts by configuration
Service parts
  • Scraper
  • Fasteners by drawing
  • Guards or dust-cover parts by site layout
Ask for matched parts
06

Data Needed For Selection

  • Material type and hardness
  • Maximum feed size
  • Target discharge size
  • Required hourly capacity
  • Roller surface preference: smooth, toothed or grooved
  • Whether the crusher will be used before a washing or fine-sand recovery system
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Overview

Application & process role

The PSJ / 2PG double roller crusher is used for medium and fine crushing sections where particle-size control, lower over-crushing and compact layout are important.

It is commonly matched after jaw primary crushing and before belt conveying, screening or SHY washing, dewatering and recovery equipment. Final selection should be confirmed according to material hardness, feed size, required discharge size and site process.

Principle

Operating principle

The double roller crusher uses two horizontal rollers rotating toward each other. Material enters from the upper feed opening and is crushed by extrusion, shearing and grinding between the roller gap. Particles smaller than the gap discharge from the bottom, while larger material is repeatedly compressed until it reaches the required size.

Selection Note

Model range notes

PSJ / 2PG roller crusher models are listed by common size. Capacity ranges are early references and should be checked against material condition and site process.

Display Logic

Website structure

Shown as an independent roller crusher / fine crushing page. It should not be mixed with hammer crusher or European reversible fine crusher pages because the crushing principle, feed boundary and wear parts are different.

Series Boundary

How buyers should choose this equipment type

Smooth roller crusher

Smooth roller surface, mainly extrusion crushing, fine output and less dust. Suitable for river pebble, granite, quartz stone and manufactured sand fine crushing.

Toothed roller crusher

Toothed roller surface, stronger shearing action and larger feed acceptance. Suitable for coal, limestone, shale, construction waste and medium-soft stone.

Grooved roller crusher

Ring-grooved roller surface improves gripping and reduces material slipping. Used for medium-hard ores and materials that need better feeding traction.

Advantages

Core advantages

  • Adjustable roller gap helps produce different sand and aggregate sizes with one machine.
  • Uniform discharge size with less over-crushing, supporting better manufactured-sand grading.
  • Simple structure, low fault rate and convenient wear-part replacement.
  • Spring protection device reduces damage risk from occasional iron or hard foreign objects.
  • Compact footprint and lower energy consumption suit small and medium aggregate or washing lines.
  • Wet material is less likely to block compared with some high-speed crushing structures when the process is matched correctly.
Limits

Operating limits

  • Feed size is limited; large raw stone normally needs jaw primary crushing before entering the roller crusher.
  • Hard and abrasive stone can wear roller skins faster during long continuous production.
  • Final sand grading depends on feed gradation, roller surface, gap setting and downstream screening.
Maintenance

Daily maintenance points

  • Check roller-skin wear regularly and repair uneven wear by overlay welding when needed.
  • Keep spring preload consistent on both sides to avoid unstable discharge size.
  • Add high-temperature grease to bearings on schedule.
  • Avoid iron blocks entering the crusher to prevent roller-skin damage or tooth breakage.
  • For washing-line applications, protect motors and bearings from water and mud.
System Flow

How the process works

Jaw primary crushing

Large raw material is first reduced to a feed size suitable for roller crushing.

Roller fine crushing

The roller crusher controls particle size through adjustable roller gap and selected roller surface.

Belt conveying

Crushed material is transferred to washing, screening or recovery equipment.

SHY washing, dewatering and recovery

When configured in a washing line, the SHY three-in-one machine washes sand, recovers fine sand and dewaters finished material.

Structure

Main machine units

Crushing rollers

Two parallel rollers with smooth, toothed or grooved surfaces. Wear-resistant high manganese steel roller skins can be repaired by overlay welding after wear.

Drive system

Two motors and reducers drive the two rollers to rotate inward synchronously.

Spring adjustment device

The roller gap can be adjusted to control discharge size. The spring buffer helps protect the machine when uncrushable hard objects enter.

Main frame

Thickened cast-steel or welded-steel frame designed to bear crushing impact and long-term production loads.

Feed and discharge hoppers

Upper feed hopper, lower discharge chute and optional guards or dust cover are matched according to site layout.

Model / Size Data

Common PSJ / 2PG specification references

Tables show common size ranges. Final configuration is checked by material hardness, mud and moisture, capacity, product size, upstream / downstream equipment and site layout.

The following ranges are for common model reference only. Actual capacity depends on material hardness, moisture, feed size, roller surface and roller-gap setting.

ParameterSmallMediumLarge
Common models 2PG400x250, 2PG610x4002PG750x500, 2PG800x6002PG1000x700
Capacity reference 5-30 t/h30-80 t/h80-150 t/h
Typical use Small sand plant, batching plant support, pre-washing fine crushingMedium aggregate line, manufactured sand fine crushingHigher-capacity fine crushing after primary crushing
Applications

Suitable materials and scenarios

Hard materials
  • River pebble / cobble
  • Granite
  • Basalt
  • Quartz sand
  • Manufactured sand fine crushing with smooth rollers
Medium-soft materials
  • Limestone
  • Coal
  • Gypsum
  • Weathered stone
  • Construction waste
  • Tailings
Typical lines
  • Manufactured sand production line
  • Fine crushing before sand washing
  • Secondary crushing in quarry
  • Small mine and batching plant stone processing
Line Position

Process role

Used after primary crushing for medium and fine crushing, sand making particle control or pre-washing fine crushing sections.

Material

Material check

Material hardness, abrasiveness, moisture, feed size and the required discharge size must be checked before selection, especially when processing hard stone for long-term production.

Inquiry

Information to send

  • Material type and hardness
  • Maximum feed size
  • Target discharge size
  • Required hourly capacity
  • Roller surface preference: smooth, toothed or grooved
  • Whether the crusher will be used before a washing or fine-sand recovery system
Selection

System parameters

  • Material hardness and abrasiveness
  • Maximum feed size
  • Target discharge size
  • Hourly capacity requirement
  • Roller surface type
  • Upstream primary crushing and downstream washing or screening process
Parts

Wear parts & spares for this equipment

Roller wear parts
  • Roller shell / roll skin
  • Smooth roller surface
  • Toothed roller surface
  • Grooved roller surface
  • Wear liner
Adjustment and drive parts
  • Spring adjustment device
  • Bearing-related parts
  • Reducer and coupling-related parts
  • V-belt or pulley parts by configuration
Service parts
  • Scraper
  • Fasteners by drawing
  • Guards or dust-cover parts by site layout
Ask for matched parts
Matching

Related equipment

  • Jaw crusher
  • Vibrating feeder
  • Belt conveyor
  • SHY washing, dewatering and recovery machine
  • Vibrating screen
Selection Summary

Quick Equipment Selection Summary

  • Large hard-rock raw stone first-stage crushing: choose a jaw crusher.
  • Small soft-stone one-machine crushing: choose an ordinary hammer crusher.
  • Medium-hard limestone or bluestone, simplified one-machine crushing: choose a heavy hammer crusher.
  • Pebble, granite and hard-rock premium aggregate: choose a cone crusher after primary crushing.
  • High-mud wet material and mud-stone separation before washing: choose a WLGSX trommel screen.
  • Dry aggregate precision grading or finished sand dewatering: choose a vibrating screen.
  • Clay-wrapped stone and deep desliming: choose an XSJ drum stone washer.
  • Low-mud clean sand with simple washing needs: choose a wheel sand washer.
  • Fine sand recovery, lower finished-sand moisture and integrated wet washing: choose the SHY three-in-one sand washing machine.
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