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GLF2021-I1-I78

Product catalog summary

Ballscrews Overview

This document details the technical specifications, standards, and recommendations for rolled ballscrews (primarily Grade C7 accuracy) and their housing units.

1. Ballscrew Types and Specifications

Handedness: Available in right hand (R) and left hand (L).
Dimensions: Various nominal diameters and pitches (in millimeters).
Accuracy Grades: Mainly Grade C7; some references to higher precision grades C5 and G7.
Manufacturing: Rolled (R) and ground (G) types.
Nut Types and Preload: Standard nuts or nuts on special planes; preload options include standard axial play (-) or preload without play (P2).
Maximum Length: Up to 3000 mm.
Materials: Screws and nuts made from X30Cr13 (AISI 420 equivalent), balls from X105CrMo17 (AISI 440 equivalent), except some nuts using 100Cr6 steel balls.

2. Delivery and Handling Recommendations

Delivered in wooden crates or U-systems.
Immediate removal from packaging recommended to prevent oxidation.
Modifications or machining of original parts are not guaranteed and may void specifications.
Machined or cut ballscrews supplied without end treatments.

3. Technical Parameters and Performance Data

Lubrication: Various oil hole types and circuit numbers specified.
Load Ratings: Detailed basic load capacities per diameter and pitch.
Preload Nuts: Available on request to reduce axial play.
Seals: Nuts sizes 8 to 16 usually without seals; larger sizes may have seals on both sides.
Speed: High-speed rolled ballscrews support dmn up to 90,000, enabling linear speeds up to 110 m/min.

4. Housing Units for Ballscrew Nuts

Various housing types with corresponding weights and dimensions.
Designed to fit specific ballscrew sizes and nut types.

5. Standards and Norms

Reference to DIN 69051 for precision screws (SND type).
Dynamic load capacity for machined end fittings limited to 75% of ballscrew’s dynamic load, except size 50x50 capped at 40 kN.

6. Tables and Data Highlights

Comprehensive tables include dimensional data, load ratings, preload values, oil hole configurations, and nut seal information.
Additional data on thread sizes, bearing types, and end fitting dimensions.

7. Key Limitations and Recommendations

Modifications or machining may affect performance and warranty.
Prompt removal from packaging critical to avoid corrosion.
Preload nuts recommended to reduce axial play.
Respect maximum length and load limits for safety and durability.

Bearings and Housing Units for Ballscrews

This section covers bearing units, fixed and free bearing housings, and support units primarily using SKF angular contact ball bearings.

1. Axial Fixation Mounted Bearings

Precision machined and hardened steel housings.
Two preloaded SKF angular contact ball bearings (series 72 or 73) mounted back-to-back.
Dual lip seals for protection.
Locking options: standard Nylstop self-locking nut or high precision KMT nut.
Dimensions and parameters provided for bore diameters 16 mm to 63 mm, including bearing codes and mounting screw sizes (M5 to M8).

2. Fixed Bearing Housings with Base

Similar construction and bearing types as axial fixation bearings.
Detailed housing dimensions, mounting hole sizes, and screw specifications.
Preloaded angular contact ball bearings with dual lip seals.

3. Free Bearing Housings with Base

Equipped with SKF deep groove ball bearings (type 62..2RS1).
Precision machined steel housings with retaining rings.
Dimensions and bearing codes for bore sizes 16 mm to 63 mm.

4. Trapezoidal Rolled Threaded Bars and Nuts

Specifications include pitch, accuracy, straightness, helix direction (right/left), weight, and lengths.
Nut types: bronze, cylindrical, and steel nuts with details on handedness, contact surface, and weight.

5. Support Units for Ballscrews

Types: fixed side and supported side units for various ballscrew models.
Bearing types: angular contact ball bearings with preload (C5 precision, zero axial clearance) or without preload (C7, max 0.018 mm axial clearance).
Load ratings: basic load, limiting axial and radial loads, axial rigidity.
Relubrication available on request.
Detailed dimensions and weights by ballscrew diameter and sleeve length.
Assembly note: critical components (housing, bearings, cover, spacer, seal, lock nut) should not be disassembled to maintain accuracy.

6. Lock Nuts

Specifications include type, weight, fastening torque, and axial load capacity.

Critical Information and Best Practices

Preloaded angular contact ball bearings ensure high rigidity and precision.
Dual lip seals protect bearings from contamination, extending service life.
Choice between Nylstop and KMT nuts depends on accuracy requirements.
Support units must be selected based on load ratings and preload for optimal performance.
Disassembly of certain support unit parts is discouraged to preserve accuracy.

Summary of Key Parameters

Bore Diameter (mm)	Bearing Code	Axial Clearance / Preload	Mounting Screw	Housing Type
16	7200 BECB / 7200 BEGA	Preloaded angular contact ball bearings	M5	Axial fixation / Fixed base
25	7303 BEGA	Preloaded angular contact ball bearings	M6	Axial fixation / Fixed base
63	7310 BEGA	Preloaded angular contact ball bearings	M8	Axial fixation / Fixed base

Note: Free bearing housings use SKF deep groove ball bearings (e.g., 6200.2RS1 series) with retaining rings.

Catalog excerpts

The ballscrews and housing ousing units

Open the catalog to page 1

R : Right hand L : Left hand Nominal diameter mm Pitch mm Accuracy Grade C7 / C5 R : Rolled ballscrew G : Ground Ballscrew Total Length Standard nut or nut on special plane P2 : Preload on SFNU nut

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ROLLED BALLSCREW Accuracy Grade C7 Ballscrews Right Left - All modiﬁcation or machining of original parts are not guaranteed

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ROLLED BALLSCREW Accuracy Grade C7 Ballscrews Right Left - All modiﬁcation or machining of original parts are not guaranteed

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ROLLED BALLSCREWS Grade C7 Basic Load Type Pitch Type - All modiﬁcation or machining of original parts are not guaranteed Left hand - On request the nut with preload (P2) Type L: Left hand R: Right hand Nominal Ø Pitch -: Nut with standard axial play P2: Nut without play Livraison Les vis à billes sont livrées emballées (caisse bois ou système U). Il est conseillé de les enlever de l’emballage dès la réception de la marchandise aﬁn d’éviter les risque

Open the catalog to page 12

ROLLED BALLSCREWS Grade C7 Basic Load Type Pitch Type - The maximum length of the ballscrews is 3000 mm - All modiﬁcation or machining of original parts are not guaranteed - The machining or cut ballscrews are without treatment at the ends Type Nominal Ø Pitch

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ROLLED BALLSCREWS Grade C7 Basic Load Type Pitch Type - All modiﬁcation or machining of original parts are not guaranteed - On request the nut with preload (P2) Type R: Right hand Nominal Ø Pitch -: Nut with standard axial play P2: Nut without play Livraison Les vis à billes sont livrées emballées (caisse bois ou système U). Il est conseillé de les enlever de l’emballage dès la réception de la marchandise aﬁn d’éviter les risque

Open the catalog to page 14

ROLLED BALLSCREWS Grade C7 Basic Load Type Pitch Type - All modiﬁcation or machining of original parts are not guaranteed Preload from lead offset Type Nominal Ø Pitch Livraison n Les vis à billes sont livrées emballées (caisse bois ou système U). Il est conseillé de les enlever de l’emballage dès la réception de la marchandise aﬁn d’éviter les risque

Open the catalog to page 15

ROLLED BALLSCREWS Basic Load Type - The nuts from 8 to 16 without seal - All modiﬁcation or machining of original parts are not guaranteed Nut type Nominal Ø Pitch Seals on both sides Livraison Les vis à billes sont livrées emballées (caisse bois ou système U). Il est conseillé de les enlever de l’emballage dès la réception de la marchandise aﬁn d’éviter les risque

Open the catalog to page 16

ROLLED BALLSCREWS Basic Load Type - All modiﬁcation or machining of original parts are not guaranteed Nut type Nominal Ø Pitch Seals on both sides Livraison n Les vis à billes sont livrées emballées (caisse bois ou système U). Il est conseillé de les enlever de l’emballage dès la réception de la marchandise aﬁn d’éviter les risque

Open the catalog to page 17

HIGH SPEED ROLLED BALLSCREWS Basic Load Type - All modiﬁcation or machining of original parts are not guaranteed Nut type Nominal Ø Pitch Livraison Les vis à billes sont livrées emballées (caisse bois ou système U). Il est conseillé de les enlever de l’emballage dès la réception de la marchandise aﬁn d’éviter les risque

Open the catalog to page 18

La vis et l’écrou sont en X30Cr13 (similaire AISI420) Les billes en X105CrMo17 (similaire AISI 440) Sauf les billes pour les écrous SDS16X5R - billes acier en 100Cr6

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Vis à billes roulée avec recirculation par pions, écrou nez ﬁleté Viss universelle Vi uniiver un iverse selllllle e SX SX

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Vis à billes roulée avec recirculation par pions Précision du pas en standard G7 Viss de Vi de précision pré éciisi sion ion SND, SND SND ND,, norme norm no rme e DIN DIN 69051

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Vis à billes avec recirculation par pions - écrou collerette cylindrique SN Vis Vi Vis is de de précision p éci pr écisi ision ion

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PLBU 40 / FLBU 40 / FLRBU 4 PLBU 50 / FLBU 50 / FLRBU 5

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Vitesse de rotation admissible élévée (dmn = 90 000) permettant d’atteindre jusqu’à 110 m/min Vis à billes permettant une vitesse linéaire élevée Précision du pas en standard G7 Viss à pas Vi p s long pa long g SL SL

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Ecrou cylindrique Ecrou collerette ronde ou selon DIN69051 Roulement à contact oblique type - ZKLN - ZKLF Paliers d’extrémités pour vis à billes type BK - FK - WBK Ecrou de serrage

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FLBU - 2A ou 3A PLBU - 2A ou 3A BUF - 4A ou 5A Pour les embouts usinés, la charge dynamique maximale admissible est égale à 75% de la capacité de charge dynamique de la vis à billes sauf pour la taille 50x50 pour laquelle la charge dynamique ne doit pas dépasser 40 Kn.

Open the catalog to page 40

• Palier de précision en acier usiné bruni • Deux roulements à billes à contacts obliques préchargés, série 72 ou 73 montés dos à dos • Deux joints à lèvres • Ecrou Nylstop autobloquant standard ou écrou KMT de haute précision sur demande Pali Paliers P alilier erss appliques ap ppl pliq ique uess à ﬁxation xatitition xa on axiale axi xial iale e équipés de roulements à billes SKF à contact oblique

Open the catalog to page 42

• Palier de précision en acier usiné bruni • Deux roulements à billes à contacts obliques préchargés, série 72 ou 73 montés dos à dos • Deux joints à lèvres • Ecrou Nylstop autobloquant standard ou écrou KMT de haute précision sur demande Pali Paliers P alilier erss ﬁxes xes à semelle seme se melllllle e équipés équiipé éq pés de roulements à billes SKF à contact oblique

Open the catalog to page 44