Spindles for pin type insulators BS and AS standard

Spindle is a slender rod or pin used in insulators as an anchor point to connect the insulators with electrical wires or cables.

Main Dimensions and Particulars of Spindle for Pin Type Insulators BS and AS standard

Note: Product’s dimension, characteristics, and strength can be designed and manufactured in accordance with customers’ requirements.

Spindle for pin insulator Definition: 

The top of spindle for pin type insulator usually have steel, lead or plastic thread which can be screwed into the pin insulator. Steel head spindle is suitable for zinc thimble type insulator. Lead or plastic head spindle is suitable for porcelain thread insulator.

About spindle for pin insulator: 

The thread on the shank of spindle for pin insulator, before galvanizing, shall be ISO metric coarse pitch series "free" class (8g) conforming to BS 3643-2. The effective thread on the shank shall be not less than 45 mm long for the 50 mm shank and not less than 75 mm long for the 130 mm shank.

The external dimensions of the nut of spindle for distribution ceramic pin insulator, before galvanizing, shall conform to BS 4190 and it shall have a thread, cut after galvanizing, conforming to BS 3643-2, but sufficiently oversize to accommodate the threaded part of the galvanized shank, as specified in 6.4. The increase in diameter to conform to this requirement shall not however exceed 0.4mm. The threads of nuts shall be oiled.

The minimum failing load of the spindle for pin insulator shall be 0.7 kN (pilot pins only), 5 kN or 10 kN.

Spindle for pin insulator types:

BS: 

High voltage insulator pin with small steel head

High voltage insulator pin with large steel head

ANSI: 

The galvanized nut bushing is in coordination with lead spindle (ANSI Standard C29.5, 1”.) 

The galvanized nut bushing is in coordination with lead spindle (ANSI Standard C29.6, 1-3/8”.) 

Insulator pin with plastic thread.