just got this hp impact, the chuck wobbles a bit side to side when there's no bit in it, is that normal?

Diagnosis

This is a standard characteristic of the 1/4" hex quick-release collet system used in the Ryobi ONE+ HP Brushless Impact Driver (PBIW01B). The "wobble" you are feeling is not a sign of a bent shaft or a manufacturing defect, but rather the necessary mechanical clearance required for the detent ball and internal spring mechanism to function. Because the chuck must allow a hex bit to slide in and lock quickly without manual tightening, there is a small amount of lateral play (usually between 0.5mm to 1.5mm) within the socket. If you shake the empty chuck, you are feeling the anvil floating slightly within the collet housing. This play is designed to ensure that bits of slightly varying tolerances from different manufacturers can still seat properly. You can confirm this is normal by inserting a high-quality 1/4" hex impact bit; once the bit is locked into the detent ball, the lateral movement should drop to nearly zero, as the bit fills the void and centers the drive assembly. If the wobble persists *after* a bit is seated, or if you hear a metallic grinding sound when rotating the chuck by hand, only then would you be looking at a faulty anvil or worn bearings.

How to Fix It

Since this is a design feature and not a mechanical failure, no repair is necessary. However, to verify that your specific unit is operating within factory specifications, follow these steps:

1. Select a standard 1/4" hex-shank impact-rated bit (avoid using non-impact "precision" bits for this test as they have thinner shanks).
2. Pull the outer sleeve of the collet forward and insert the bit firmly until you hear or feel the detent ball click into the groove of the bit.
3. Grasp the bit firmly and attempt to wiggle it side-to-side. You should notice that the "slop" felt when the chuck was empty has vanished.
4. Place the driver on a flat surface and engage the trigger at the lowest speed setting. Observe the tip of the bit; there should be no visible "orbit" or circular oscillation exceeding 1mm.
5. If the bit is secure and the rotation is concentric, the tool is functioning as intended.

If That Didn't Work

If you have inserted a bit and the wobble is still excessive or the bit feels loose, try these alternatives:

• Switch Bit Brands: Not all 1/4" hex bits are machined to the same tolerance. Cheap, non-impact bits are often undersized. Try a high-tolerance impact bit from a professional line to see if the play disappears.
• Inspect for Debris: Use a can of compressed air to blow out the collet. Small metal shavings or construction dust can get trapped behind the detent ball, preventing the bit from seating fully and creating the illusion of a wobble.
• Check for Collet Spring Tension: Pull the sleeve forward and release it quickly several times. If the sleeve feels "mushy" or doesn't snap back instantly, the internal spring may be misaligned, which can cause the bit to sit off-center.
• Warranty Exchange: If the anvil exhibits significant runout (the bit describes a large circle while spinning) even with a premium bit installed, the internal bearings or the anvil itself may be skewed. This is a factory defect and requires a replacement under the Ryobi warranty.

Heads Up

• Avoid using "Quick-Change" bit holders that are not impact-rated; these often add an extra layer of play and can snap under the high torque of the HP Brushless motor.
• Periodically apply a tiny drop of dry PTFE lubricant to the outer collet sleeve if it becomes stiff, but avoid heavy greases that attract grit and sawdust.
• Always ensure the bit is fully seated before applying trigger pressure; driving a partially seated bit can deform the detent ball and permanently increase the wobble.
• Keep the tool away from extreme moisture, as the internal spring in the chuck can rust, leading to a "sticky" collet that doesn't center the bit properly.