THK Co., Ltd. BNF3212S-5RRG0973LC5 Ball Screw Assembly

Description:

The THK BNF3212S-5RRG0973LC5 Ball Screw Assembly A97L-0118-0299 is a precision ground ball screw featuring a 32 mm screw shaft diameter, 12 mm lead, and an overall screw shaft length of 973 mm. Designed to convert rotary motion into highly accurate linear motion, it provides low friction, high rigidity, and excellent positioning accuracy for precision machine applications. Commonly installed in CNC machining centers, machining tools, semiconductor equipment, precision automation systems, and industrial positioning machinery. Maintenance teams and machine builders use this ball screw for equipment repair, retrofit, expansion, and replacement. 

Applications:

The THK BNF3212S-5RRG0973LC5 belongs to the BNF Series of precision ground ball screws. The base model BNF3212 features a 32 mm screw shaft diameter and a 12 mm lead, making it suitable for high-load, high-precision positioning applications. The overall shaft length is 973 mm as identified by the "0973L" designation. The suffixes "S-5RRG" and "C5" are THK factory configuration codes that define internal manufacturing options such as shaft-end machining, preload, accuracy grade, or customer-specific specifications. THK does not publicly decode these suffixes, so their exact meanings should not be inferred without the original manufacturing drawing or order specification. The FANUC ordering code A97L-0118-0299 is commonly used to identify this THK ball screw assembly as an OEM replacement component.

Technical Specifications:

• Brand: THK
• OEM Part Number: A97L-0118-0299 (FANUC)
• THK Part Number: BNF3212S-5RRG0973LC5
• Product Type: Precision Ground Ball Screw Assembly
• Series: BNF
• Screw Shaft Diameter: 32 mm
• Lead: 12 mm
• Overall Screw Length: 973 mm
• Ball Screw Type: Precision Ground
• Ball Nut Type: Single Flanged Nut
• Motion Type: Rotary-to-Linear Motion
• Accuracy Grade: C5 (as designated in the part number)
• Lubrication: Grease or Oil Compatible
• Material: Hardened Alloy Steel
• Features: High positioning accuracy, low friction, high rigidity, smooth linear motion, precision-ground screw shaft, and long service life.

Note: The suffixes "S", "5RRG", and other manufacturing codes are proprietary THK configuration identifiers that are not publicly documented. Their meanings should not be interpreted without the original THK engineering documentation.

Common Replacements:

• THK BNF3212V-5 Precision Ball Screw
• THK BIF3212V-5 Precision Ball Screw
• THK BNFN3212 Series Double-Nut Precision Ball Screw