Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Silver Dart boring machine
Holman Silver Dart. Introduced after the SL9, the Silver Dart machine was slightly heavier and had a longer stroke. Suitable for use in rock of medium hardness it was, like the SL9, equipped for wet drilling. This particular machine was used at Wyllie Colliery and is shown with a 7/8" hexagon drilling rod and a tungsten carbide-tipped push-on bit.
Pwnc
Diwydiant
Rhif yr Eitem
69.146/11
Mesuriadau
Meithder
(mm): 810
Lled
(mm): 435
Uchder
(mm): 120
Dosbarth
mineral/rock extractionNid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.