Unfinished Shaft Ends Precision Ball Screw
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- Matilda Norris
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1 Standard Stock Models BIF, MDK, MBF and BNF Point of Selection Options Model No. Precautions on Use ccessories for ubrication Mounting Procedure and Maintenance B ead ngle ccuracy ccuracy of the Mounting Surface xial clearance DN Value Support Unit Recommended Shapes of Shaft Ends
2 Structure and Features This type of Ball Screw is manufactured by cutting the standardized screw shafts of Precision Ball Screws to regular s. dditional machining of the shaft ends can easily be performed. To meet various intended purposes, TK offers several Ball Screw models with different types of nuts: the single-nut type (model BNF), the offset preload-nut type (model BIF) and the miniature Ball Screw (models MDK and MBF). Contamination Protection s of the following model numbers are attached with a labyrinth seal. ll variations of models BNF and BIF Model MDK0802/1002/1202/1402/1404/1405 When dust or other foreign material may enter the Ball Screw, it is necessary to use a contamination protection device (e.g., bellows) to completely protect the screw shaft. ubrication The ball screw nuts are supplied with lithium soap-group grease with shipments. (Models MDK and MBF are applied only with an anti-rust oil.) dditional Machining of the Shaft End Since only the effective thread of the screw shaft is surface treated with induction-hardening (all variations of models BNF and BIF; model MDK 1405) or carburizing (all variations of model MBF; model MDK0401 to 1404), the shaft ends can additionally be machined easily either by grinding or milling. In addition, since both ends of the screw shaft have a center hole, they can be cylindrically ground. Surface hardness of the effect thread : RC58 to 64 ardness of the screw shaft ends ll variation of models BNF and BIF; model MDK 1405 : RC22 to 27 ll variations of model MBF; model MDK0401 to 1404 : RC35 or below TK has standardized the shapes of the screw shaft ends in order to allow speedy estimation and manufacturing of the Ball Screws. The shapes of shaft ends are divided into those allowing the standard support units to be used (symbols, K and J) and those compliant with JIS B (symbols, B and C). See for details. Ball Screw
3 Types and Features Preload Type Model BIF The right and left screws are provided with a phase in the middle of the ball screw nut, and an axial clearance is set at a below-zero value (under a preload). This compact model is capable of a smooth motion. Specification Table
4 No Preload Type Models MDK and MBF miniature type with a screw shaft of 4 to 14 mm and a lead of 1 to 5mm. Specification Table Model BNF The simplest type with a single ball screw nut. It is designed to be mounted using the bolt holes drilled on the flange. Specification Table Ball Screw
5 Types and xial Clearance Screw shaft outer (mm) 4 to 14 Model MDK Model MBF type No preload type No preload type ccuracy grades C3, C5 C7 C3, C5 C7 xial clearance (mm) or less (GT) 0.02 or less (G2) or less (GT) 0.02 or less (G2) Note) The symbols in the parentheses indicate axial clearance symbols. Screw shaft out (mm) 16 to 50 Model BIF Model BNF type Preload Type No preload type ccuracy grades C5 C7 C5 C7 xial clearance (mm) 0 or less (G0) 0 or less (G0) 0.01 or less (G1) 0.02 or less (G2) Note1) The symbols in the parentheses indicate axial clearance symbols.
6 Ball Screw
7 Unfinished Shaft Ends 4-1 through hole φ Dg6 4 Tw K l 0 l 2 l 3 Model MDK Model No. Screw shaft outer ead Ball screw specifi cations Ball center-tocenter Thread minor No. of loaded circuits Basic load rating Outer Ca C 0 a Flange d Ph dp dc Rows turns kn kn D D 1 1 MDK MBF MDK MBF Note) Models MDK/MBF 0401 and 0601 are not provided with a labyrinth seal. Model number coding MDK GT +95 C5 Model number screw shaft (in mm) Symbol for standard-stock type (: with unfinished shaft ends) Symbol for clearance ccuracy symbol (*2) in the axial direction (*1) (*1) See. (*2) See.
8 2-1 through hole, 2 counter bore depth h 3 φ Dg6 4 Tw K l 0 l 2 l 3 Dimensions Standardstock symbol Model MBF Screw shaft dimensions Unit: mm Shaft B 1 d 1 d 2 h Tw l 0 l 2 l 3 d 3 d 4 K kg kg/m Ball Screw Options
9 Unfinished Shaft Ends 4-1 through hole φ Dg6 4 Tw K l 0 l 2 l 3 Model MDK Model No. Screw shaft outer ead Ball screw specifi cations Ball center-tocenter Thread minor No. of loaded circuits Basic load rating Outer Ca C 0 a Flange d Ph dp dc Rows turns kn kn D D 1 1 MDK MDK MBF Note) Model MDK 0801 is not provided with a labyrinth seal. Model number coding MBF RR GT +218 C5 Model number Seal symbol (*1) screw shaft (in mm) Symbol for clearance in the axial direction (*2) ccuracy symbol (*3) Symbol for standard-stock type (: with unfinished shaft ends) (*1) See. (*2) See. (*3) See.
10 2-1 through hole, 2 counter bore depth h 3 φ Dg6 4 Tw K l 0 l 2 l 3 Dimensions Standardstock symbol Model MBF Screw shaft dimensions Unit: mm Shaft B 1 d 1 d 2 h Tw l 0 l 2 l 3 d 3 d 4 K kg kg/m Ball Screw Options
11 Unfinished Shaft Ends 4-1 through hole φ Dg6 4 Tw K l 0 l 2 l 3 Model MDK Model No. Screw shaft outer ead Ball screw specifi cations Ball center-tocenter Thread minor No. of loaded circuits Basic load rating Outer Ca C 0 a Flange d Ph dp dc Rows turns kn kn D D 1 1 MDK MBF MDK MBF Model number coding MDK RR GT +165 C5 Model number Seal symbol (*1) screw shaft (in mm) Symbol for clearance in the axial direction (*2) ccuracy symbol (*3) Symbol for standard-stock type (: with unfinished shaft ends) (*1) See. (*2) See. (*3) See.
12 2-1 through hole, 2 counter bore depth h 3 φ Dg6 4 Tw K l 0 l 2 l 3 Dimensions Standardstock symbol Model MBF Screw shaft dimensions Unit: mm Shaft B 1 d 1 d 2 h Tw l 0 l 2 l 3 d 3 d 4 K kg kg/m Ball Screw Options
13 Unfinished Shaft Ends 4-1 through hole φ Dg6 φ d4 Tw K l 0 l 2 l 3 Model MDK Model No. Screw shaft outer Ball screw specifi cations ead Ball Thread No. of Basic load rating Outer Flange center-tocenter minor loaded circuits Ca C 0 a d Ph dp dc Rows turns kn kn D D 1 1 MDK MBF Model number coding MBF RR GT +245 C3 Model number Seal symbol (*1) screw shaft (in mm) Symbol for clearance in the axial direction (*2) ccuracy symbol (*3) Symbol for standard-stock type (: with unfinished shaft ends) (*1) See. (*2) See. (*3) See.
14 2-1 through hole, 2 counter bore depth h 3 φ Dg6 4 Tw K l 0 l 2 l 3 Dimensions Standardstock symbol Model MBF Screw shaft dimensions Unit: mm Shaft B 1 d 1 d 2 h Tw l 0 l 2 l 3 d 3 d 4 K kg kg/m Ball Screw Options
15 Unfinished Shaft Ends 4-1 through hole φ Dg6 φ d4 Tw K l 0 l 2 l 3 Model MDK Model No. Screw shaft outer Ball screw specifi cations ead Ball Thread No. of Basic load rating Outer Flange center-tocenter minor loaded circuits Ca C 0 a d Ph dp dc Rows turns kn kn D D 1 1 MDK MBF MDK Model number coding MDK RR G C7 Model number Seal symbol (*1) screw shaft (in mm) Symbol for clearance in the axial direction (*2) ccuracy symbol (*3) Symbol for standard-stock type (: with unfinished shaft ends) (*1) See. (*2) See. (*3) See.
16 2-1 through hole, 2 counter bore depth h 3 φ Dg6 4 Tw K l 0 l 2 l 3 Dimensions Standardstock symbol Model MBF Screw shaft dimensions Unit: mm Shaft B 1 d 1 d 2 h Tw l 0 l 2 l 3 d 3 d 4 K kg kg/m M6 (Greasing hole) through hole Ball Screw φ Dg6 Tw Model MDK 1405 Options
17 Unfinished Shaft Ends (Greasing hole) h 1 p φ Dg6 C1 4 l 2 l 0 Model BIF Model No. Screw shaft outer ead Ball screw specifi cations Ball centerto-center Thread minor No. of loaded circuits Basic load rating Outer Flange d Ph dp dc Rows turns kn kn D D 1 1 kg Ca C 0 a Mass BNF BIF BNF BIF BNF BIF Model number coding BIF RR G C5 Model number Seal symbol (*1) screw shaft (in mm) Symbol for clearance in the axial direction (*2) ccuracy symbol (*3) Symbol for standard-stock type (symbol or B) (*1) See. (*2) See. (*3) See.
18 (Greasing hole) h φ d1 p φ Dg6 C1 4 l 2 l 0 Dimensions Greasing hole Model BNF Standardstock symbol Screw shaft dimensions Unit: mm Shaft B 1 d 1 d 2 h l 0 l 2 d 3 d 4 kg/m M M M6 B Ball Screw Options
19 Unfinished Shaft Ends (Greasing hole) h 1 p φ Dg6 C1 4 l 2 l 0 Model BIF Model No. Screw shaft outer ead Ball screw specifi cations Ball centerto-center Thread minor No. of loaded circuits Basic load rating Outer Flange d Ph dp dc Rows turns kn kn D D 1 1 kg Ca C 0 a Mass BNF BIF BNF BIF Model number coding BIF RR G C5 B Model number Seal symbol (*1) screw shaft (in mm) Symbol for standard-stock type (symbol or B) Symbol for clearance in the axial direction (*2) ccuracy symbol (*3) (*1) See. (*2) See. (*3) See.
20 (Greasing hole) h φ d1 p φ Dg6 C1 4 l 2 l 0 Model BNF Unit: mm Dimensions Greasing hole Standardstock symbol Screw shaft dimensions Shaft B 1 d 1 d 2 h l 0 l 2 d 3 d 4 kg/m M M6 B Ball Screw Options
21 Unfinished Shaft Ends h 2 1 p φ Dg6 (Greasing hole) 60 3 C1 4 l 2 l 0 Model BIF Model No. Screw shaft outer ead Ball screw specifi cations Ball centerto-center Thread minor No. of loaded circuits Basic load rating Outer Flange d Ph dp dc Rows turns kn kn D D 1 1 kg Ca C 0 a Mass BNF BIF BIF BNF BIF BIF Model number coding BIF RR G C5 Model number Seal symbol (*1) screw shaft (in mm) Symbol for clearance in the axial direction (*2) ccuracy symbol (*3) Symbol for standard-stock type (symbol or B) (*1) See. (*2) See. (*3) See.
22 (Greasing hole) h φ d1 p φ Dg6 C1 4 l 2 l 0 Model BNF Unit: mm Dimensions Greasing hole Standardstock symbol Screw shaft dimensions Shaft B 1 d 1 d 2 h l 0 l 2 d 3 d 4 kg/m M M6 B Ball Screw Options
23 Unfinished Shaft Ends h 2 1 p φ Dg6 (Greasing hole) 60 3 C1 4 l 2 l 0 Model BIF Model No. Screw shaft outer ead Ball screw specifi cations Ball centerto-center Thread minor No. of loaded circuits Basic load rating Outer Flange d Ph dp dc Rows turns kn kn D D 1 1 kg Ca C 0 a Mass BNF BIF BIF BNF BIF Model number coding BIF RR G C5 B Model number Seal symbol (*1) screw shaft (in mm) Symbol for clearance in the axial direction (*2) ccuracy symbol (*3) Symbol for standard-stock type (symbol or B) (*1) See. (*2) See. (*3) See.
24 (Greasing hole) h φ d1 p φ Dg6 C1 4 l 2 l 0 Model BNF Unit: mm Dimensions Greasing hole Standardstock symbol Screw shaft dimensions Shaft B 1 d 1 d 2 h l 0 l 2 d 3 d 4 kg/m M M6 B Ball Screw Options
25 Unfinished Shaft Ends (Greasing hole) h 1 p φ Dg6 C1 4 l 2 l 0 Model BIF Model No. Screw shaft outer ead Ball screw specifi cations Ball centerto-center Thread minor No. of loaded circuits Basic load rating Outer Flange d Ph dp dc Rows turns kn kn D D 1 1 kg Ca C 0 a Mass BNF BIF BIF BNF BIF BIF Model number coding BIF RR G C5 Model number Seal symbol (*1) screw shaft (in mm) Symbol for standard-stock type (symbol or B) Symbol for clearance in the axial direction (*2) ccuracy symbol (*3) (*1) See. (*2) See. (*3) See.
26 (Greasing hole) h φ d1 p φ Dg6 C1 4 l 2 l 0 Model BNF Unit: mm Dimensions Greasing hole Standardstock symbol Screw shaft dimensions Shaft B 1 d 1 d 2 h l 0 l 2 d 3 d 4 kg/m M M6 B Ball Screw Options
27 Unfinished Shaft Ends h 2 1 p φ Dg6 (Greasing hole) 60 3 C1 4 l 2 l 0 Model BIF Model No. Screw shaft outer ead Ball screw specifi cations Ball centerto-center Thread minor No. of loaded circuits Basic load rating Outer Flange d Ph dp dc Rows turns kn kn D D 1 1 kg Ca C 0 a Mass BNF BIF BIF BNF BIF BIF Model number coding BIF RR G C5 Model number Seal symbol (*1) screw shaft (in mm) Symbol for clearance in the axial direction (*2) ccuracy symbol (*3) Symbol for standard-stock type (symbol or B) (*1) See. (*2) See. (*3) See.
28 (Greasing hole) h φ d1 p φ Dg6 C1 4 l 2 l 0 Model BNF Unit: mm Dimensions Greasing hole Standardstock symbol Screw shaft dimensions Shaft B 1 d 1 d 2 h l 0 l 2 d 3 d 4 kg/m M PT 1/8 B Ball Screw Options
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