BS ISO 500-1-2014 PDF

Full title and description

BS ISO 500-1:2014 — Agricultural tractors. Rear-mounted power take-off types 1, 2, 3 and 4. General specifications, safety requirements, dimensions for master shield and clearance zone. This is the British adoption of ISO 500-1:2014 and contains the specifications and safety requirements for rear-mounted PTOs on agricultural tractors with a track setting greater than 1 150 mm.

Abstract

Gives general specifications (including speeds), safety requirements, and the dimensions for the master shield and clearance zones for rear‑mounted power take-offs (PTOs) of types 1, 2, 3 and 4 on agricultural tractors with a track setting of more than 1 150 mm (tractors with track setting of 1 150 mm or less are covered by ISO 500-2).

General information

• Status: Confirmed / Published (British adoption of ISO 500-1:2014).
• Publication date: 30 April 2014 (British publication/adoption).
• Publisher: BSI (British Standards Institution) — adoption of the International Standard ISO 500-1:2014.
• ICS / categories: 65.060.10 (Agricultural tractors — power take-off equipment).
• Edition / version: Corresponds to ISO 500-1:2014 (ISO edition 2, published 2014).
• Number of pages: British edition typically published as 14 pages (PDF/printed BSI release).

Scope

This part specifies general requirements and dimensional criteria for rear-mounted PTOs (types 1–4) fitted to agricultural tractors with a track setting greater than 1 150 mm. It covers speeds, safety-related design and the dimensions and clearance zones for the master shield used to protect rotating PTO shafts; smaller‑track tractors are addressed in ISO 500-2. The British publication is an identical adoption of the ISO text.

Key topics and requirements

• Definitions and classification of rear‑mounted PTO types 1, 2, 3 and 4.
• Design speeds and overspeed considerations for PTO shafts.
• Safety requirements for guarding (master shield) and required clearance zones.
• Dimensional specifications for master shield and protected zone to reduce entanglement and contact risk.
• Normative references to related parts (ISO 500-2, ISO 500-3) and earlier editions replaced by this 2014 release.

Typical use and users

Used by tractor and agricultural equipment manufacturers, design engineers, safety compliance officers, test laboratories, and standards/technical committees to ensure PTO designs meet international safety and dimensional requirements. Also used by regulators and purchasers specifying safe PTO arrangements for tractors with wider track settings.

Related standards

Closely related to ISO 500-2 (PTOs for tractors with track setting ≤ 1 150 mm) and ISO 500-3 (other related parts); this 2014 part, together with ISO 500-2 and ISO 500-3, superseded earlier ISO 500 editions. Other referenced standards include ISO documents on mechanical connections and related safety tests.

Keywords

rear-mounted PTO, power take-off, agricultural tractor, master shield, clearance zone, PTO types 1–4, safety requirements, dimensions, BSI, ISO 500-1:2014.

FAQ

Q: What is this standard?

A: BS ISO 500-1:2014 is the British adoption of ISO 500-1:2014 specifying general specifications, safety requirements and dimensional criteria for rear‑mounted power take-offs (PTOs) of types 1–4 on agricultural tractors with track setting > 1 150 mm.

Q: What does it cover?

A: It covers classification of PTO types, design and permitted speeds, guarding (master shield) dimensions, and required clearance zones to reduce risk of contact and entanglement for tractors with wider track settings.

Q: Who typically uses it?

A: Tractor designers and manufacturers, agricultural equipment safety engineers, conformity assessment bodies, procurement/specification authors and national standards committees.

Q: Is it current or superseded?

A: The ISO 500-1:2014 edition has been reviewed and confirmed (ISO record shows review/confirmation in 2024) and the British version is listed as confirmed; it remains the current published edition for this part. Users should check national catalogues for any later amendments or corrigenda.

Q: Is it part of a series?

A: Yes — it is Part 1 of the ISO 500 series addressing rear‑mounted PTOs; related parts include ISO 500-2 and ISO 500-3 which together cover other tractor track settings and complementary requirements.

Q: What are the key keywords?

A: Rear-mounted PTO, master shield, clearance zone, PTO types 1–4, agricultural tractors, safety requirements, ISO 500-1:2014, BS ISO.