IR 30x35x20 Inner ring JNS - 1 pcs.
Inner ring JNS IR303520, IR series without lubrication hole. Dimensions d×F×B: 30×35×20 mm. Sales unit: 1 piece.

Inner ring JNS IR303520
JNS IR-series needle roller bearing inner ring, with dimensions 30 × 35 × 20 mm. Manufacturer designation: IR303520.
Design
The IR variant is made without a lubrication hole. The JNS catalogue describes rings in this series as heat-treated and precision-ground, with chamfered edges on the end faces.
Sales unit
One sales unit includes 1 inner ring JNS IR303520.

Catalogue dimensions
d — bore diameter: 30 mm; catalogue deviations 0 / -0,01 mm
F — outside diameter: 35 mm
B — width: 20 mm
rₛ min — minimum chamfer dimension: 0,3 mm
da — abutment diameter according to catalogue: min 32 mm, max 34 mm
The photograph shows the JNS ring family. The diagram shows catalogue dimensions; it is not a production drawing.
Questions and answers
How can the correct JNS variant be identified?
The manufacturer designation is IR303520, IR series. The dimensional designation of this variant is IR 30×35×20.
What dimensions and bore deviations does this ring have?
Bore diameter d is 30 mm, outside diameter F 35 mm and width B 20 mm. The catalogue states deviations of 0 / -0,01 mm for d.
Does this variant have a lubrication hole?
No. The ring belongs to the IR series, which the JNS catalogue identifies as a design without a lubrication hole.
What does one sales unit include?
One sales unit includes 1 inner ring JNS IR303520.
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Sales unit1 pc
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Component typeNeedle roller bearing inner ring
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Width B20 mm
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ManufacturerJNS
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Bore diameter d30 mm
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Manufacturer designationIR303520
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SeriesIR
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Catalogue deviations d0 / -0,01 mm
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Outside diameter F35 mm
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Chamfer dimension rₛ min0,3 mm
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Abutment diameter da according to cataloguemin 32 mm; max 34 mm
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Lubrication holeNone
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TreatmentHeat treatment
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Surface finishFine grinding
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End face edgesChamfered
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Country of origin according to supplierJapan
1. Eye protection:
– Always wear safety goggles or a face shield to protect your eyes from sparks, particles and metal fragments.
2. Hearing protection:
– When working in a noisy environment, use ear defenders or earplugs to prevent hearing damage.
3. Respiratory protection:
– When working in dusty surroundings or in the presence of fumes, wear a filtering mask or an appropriate respirator.
– Ensure proper ventilation of the workstation.
4. Hand and skin safety:
– Use protective gloves that protect against mechanical injuries and chemicals.
– Where necessary, use protective creams to prevent irritation and dry skin.
5. Work clothing:
– Work in protective clothing resistant to sparks and splashes.
– Avoid loose clothing, jewellery and loose hair near machinery.
6. Fire risk:
– Keep the workstation free of flammable materials (e.g. paper, fabrics and chemicals).
– Keep a serviceable fire extinguisher close at hand and know how to use it.
7. Electrical hazards:
– Check the condition of cables and electrical equipment before use.
– Do not use electrical devices in damp conditions.
– Disconnect equipment from the power supply during maintenance or repairs.
8. Use of machinery and tools:
– Regularly inspect the technical condition of machines and tools.
– Use equipment in accordance with the manufacturer's instructions.
– Blades and tools should be maintained regularly and kept in good condition.
– Machines should be fitted with appropriate guards and protective devices.
9. Handling materials:
– Use handling equipment to move heavy components.
– Lift and carry using ergonomic practices to avoid injury.
10. Working with chemicals:
– Store chemicals in labelled, safe containers.
– Use substances in accordance with the manufacturer's instructions and occupational health and safety rules.
– Ensure air circulation when using chemicals.
Other important rules:
– Keep the workstation clean and tidy.
– Ensure adequate lighting in the working area.
– Provide occupational health and safety training.
– Carry out regular safety audits and comply with current regulations.

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