RH JAW KIT 1

RH JAW KIT 1 3719 0045 31 this is the business end that actually grabs onto your drill rod inside the rock drill chuck. It's what takes all that rotational torque and impact energy from the drill and transfers it straight into the steel, pushing it downhole. Basically, if these aren't holding tight, you're not making hole efficiently, or sometimes at all.

When these jaws start getting tired, usually what happens is you'll notice the drill rod slipping a bit in the chuck, especially when you're really leaning on it. You might hear a distinct 'clunking' or a sort of grinding noise coming from the front head area, particularly during collaring or when the bit grabs. That slippage doesn't just reduce your penetration rate; it also starts chewing up the shanks of your drill rods pretty quick, which gets expensive fast.

When you're swapping these out, don't just yank the old ones and slap in the new. Take a minute to really clean out the chuck housing; any grit or old grease in there can mess up the new jaws' seating. And this is key: always, always check the chuck bushing at the same time. It's a common oversight, but if that bushing is worn, your new jaws won't last long, and you'll be back in there sooner than you want.