The A1 blog

Counter knowledge, written down.

Fifty years of hydraulic questions walk through our door. These are the answers we give most — threads, hoses, failures, and the judgment calls in between.

Latest · Jul 6, 2026 · Threads · Identification

The Complete Guide to Hydraulic Thread Identification

How to identify any hydraulic fitting thread with calipers and a pitch gauge — JIC, ORFS, NPT, BSP, metric, and the look-alikes that cause leaks.

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Jun 22, 2026 · Hoses

Why Hydraulic Hoses Fail — And How to Read the Evidence

Abrasion, impulse fatigue, heat aging, bad routing, wrong crimps: the seven real causes of hydraulic hose failure and what the failed hose tells you about each.

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Jun 8, 2026 · Threads

JIC vs ORFS vs Flat-Face: Choosing Hydraulic Fitting Ends

A deep comparison of the three fitting families on modern equipment — how each seals, where each wins, conversion strategy, and the mistakes that mix them badly.

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May 18, 2026 · Hoses

Hydraulic Hose Dash Sizes Explained (With Charts)

What -4, -8, and -16 actually mean, how dash size relates to inside diameter and flow, and how to size a hydraulic hose so it doesn't overheat your system.

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Apr 27, 2026 · Hoses

SAE and EN Hydraulic Hose Standards, Explained Simply

What SAE 100R1 through R17 and EN 853/856 actually specify, how the two systems map to each other, and how to read any hose layline with confidence.

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Apr 6, 2026 · Portable power

Portable Hydraulic Power Units: A Working Buyer's Guide

How to spec a portable hydraulic power unit — pressure, flow, duty cycle, power source, and the details that separate a unit that works from one that survives.

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Mar 16, 2026 · Safety

Working Pressure, Burst Pressure, and the 4:1 Safety Factor

What hydraulic hose ratings actually mean, why the 4:1 design factor exists, how impulse spikes eat into it, and why the fitting — not the hose — often sets the real limit.

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Feb 23, 2026 · Threads

Metric and BSP Fittings on US Equipment: A Survival Guide

Why imported machines strand US fleets, how to identify DIN, BSP, JIS and Komatsu-pattern connections, and the adapter strategy that keeps mixed fleets running.

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Feb 2, 2026 · Hoses

Hydraulic Hose Routing: The Cheapest Reliability Upgrade There Is

Bend radius, twist, length allowance, clamping, and abrasion protection — the routing rules that double hose life without costing more than attention.

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Jan 12, 2026 · Repair

Repair or Replace a Hydraulic Cylinder? How the Bench Decides

Drift, leaks, bent rods, scored barrels — what each cylinder symptom means, what repairs actually cost relative to replacement, and the honest decision framework.

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