how to true a lathe chuck

{"cid":"91221822","title":"STEKI 2018 Shaft Holder Lathe Chuck Jaws 2 Jaws with Round\/Square Mouth and VT Inserts","imgUrl":"https:\/\/img.chinax.com\/nimg\/01\/d0\/85949eb207ce51aaed5a7589aec5-200x200-1.jpg","attrs":{"Price":"$280.00 - $330.00\/pairs","Brand Name":"STEKI","Model Number":"STW\/STO, FLO\/FLW","Place of Origin":"Taiwan, China","Power":"Pneumatic","Number of Jaws":"2","slip safety chucks":"slip safety chucks (SKW\/SKO)","Packaging Details":"1prs\/carton, wooden carton if necessary.","Port":"shanghai, fuzhou","Supply Ability":"100 Pair\/Pairs per Quarter"}}

{"cid":"91149676","title":"Finishing Machine CNC Lathe Tool Holder ER Collet Chuck Below 0.003mm Runout","imgUrl":"https:\/\/img.chinax.com\/nimg\/ea\/b0\/48240434fa20e487d5867afdd0aa-200x200-1.jpg","attrs":{"Price":"Negotiable (Price term: EXW, FOB, CFR, CIF )","Brand Name":"HIPPSC","Model Number":"HSK63A-MX06-90","Minimum Order Quantity":"1 pcs","Delivery Time":"2~30 Work days","Certification":"ISO9001","Place of Origin":"Dongguan, China","Payment Terms":"T\/T, Western Union, Paypal, L\/C","Supply Ability":"2000pcs Per Month","Packaging Details":"Plastic Box with Inner PE Bag In Carton","Spindle Type":"BBT","Color":"Silver White","Hardness":"HRC48~52","Product Type":"ER Collet Chuck","Application":"Precision Finishing","Cutting Type":"EndMilling, Reaming, Drilling"}}