# Needle Roller Charts Before You Swap a Drawn Cup

Drawn-cup needle rollers fail quietly when the wrong shaft tolerance or outer cup ID sneaks into a rebuild. Charts that map HK, BK, and NA series to ISO dimensions save a second teardown.

Match cage type, needle count, and lip style before you copy a competitor SKU. For sizing and interchange notes, see TFL Bearing and the full write-up on needle roller bearings reference charts.

Keep grease fill and seal orientation notes next to the dimension table so the floor crew does not guess. Buyers who need OEM-fit replacements can also open sdtflbearing.com before they freeze a drawing or RFQ.

Shandong TFL Bearing Co., Ltd keeps Portuguese product pages aligned with English engineering notes so global plants share one cross-reference language.