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Linear motion

05 · Linear motion · Newark, DE

Ball screws cut to your length, and wipers matched from the torn one.

Ball screw replacement quoted to length with lead and accuracy grade stated, end journals machined to your drawing or the old screw. Way wipers for CNC matched to profile and bolt pattern from a sample or a photo with a rule beside it. Shipped to shops anywhere in the United States.

Ball screws: per assembly Wipers: per wiper Quoted on inquiry

Ask for a linear motion quote (302) 366-0113

A ball screw and nut pulled from a machine axis resting on V-blocks — Old screw out, on V-blocks. Measure it here before anything else happens to it.

Item 05.1

Close view of a ball screw nut on its ground thread

Recirculation tube on top. The nut and screw ship together, preloaded, never separated.

Ball screw replacement · per assembly

Ball screws, quoted to length.

A ball screw assembly is the screw, the nut and whatever the ends need to seat in your support bearings. We quote the whole assembly cut and end-machined to length. Journals are turned to your drawing, or to the old screw if you send it or measure it properly. A screw that arrives the right lead and the wrong journal is no use to you on a Monday.

Two numbers decide the screw. Lead is how far the nut travels per turn: 5 mm, 10 mm, 0.200 in and so on. It has to match what your control's pitch compensation and motor gearing expect. Accuracy grade is how far the travel can drift from true over a length. C5 is ground and tighter, the usual choice on machining centres. C7 is rolled, costs less, and is fine on routers and older knee-mill retrofits.

What we see most: a shop orders C7 to save money on a VMC axis, then spends a week chasing positioning error the compensation table can't hide. If the machine left the factory with C5, put C5 back.

Accuracy grade: C5 (ground) or C7 (rolled), stated on the quote
Lead: Matched to the original, metric or inch
Nut: Single or double nut, preload per original
Ends: Machined to your drawing or the old screw
Match by: Diameter, lead, overall length, journal dimensions, nut flange

Price basisPer assembly, cut and end-machined to length, quoted on inquiry. The quote depends on diameter, grade and how much end machining the journals need.

Lead time stated on the reply, by grade and length

Ask for a linear motion quote

Lead and grade, side by side

What C5 and C7 actually allow over 300 mm.

The grade figure is the permitted travel variation over any 300 mm of stroke, per JIS B 1192. Smaller is tighter.

Ball screw accuracy grades in common use
Grade	Travel variation per 300 mm	How it is made	Where it belongs
C3	0.008 mm	Ground	Grinders, jig borers. On request only
C5	0.018 mm	Ground	Machining centres, CNC lathes
C7	0.050 mm	Rolled	Routers, plasma, retrofits, positioning axes
C10	0.210 mm	Rolled	Not supplied for machine tool axes

Figures are the published grade limits. Your old screw's grade is often etched or stamped near the nut flange.

Item 05.2

A torn way wiper beside its replacement with a steel rule across both

This is the photo we want: old and flat, rule across it, shot square from above.

Way wipers for CNC · per wiper

Way wipers, matched from a sample.

Send us the worn wiper, or a photo with a tape measure beside it. We match the profile and the bolt pattern and tell you what it will take to get here. Way wipers are nitrile or polyurethane lips bonded to a steel or aluminium backing plate, cut to the profile of the way they ride on. Box ways, dovetails and linear guide rails each take a different shape.

A torn wiper lets chips and coolant under the saddle. On box ways that means scored turcite. On linear guides it means contaminated blocks. Either costs far more than the wiper. If a lip is split, curled or hard enough to crack when you bend it, change it.

We don't make wipers from a description over the phone. Not because we're fussy. Because "about two inches wide with a notch" matches forty profiles.

Lip material: Nitrile or polyurethane, per original
Backing: Steel or aluminium plate
Profiles: Box way, dovetail, linear rail, custom from sample
Match by: Sample, or photo with a rule plus the measurements below

Price basisPer wiper, quoted on inquiry. Custom profiles cut from a sample cost more than a stock profile.

Lead time stated on the reply, stock or custom

Ask for a linear motion quote

How to measure a worn wiper

Five measurements, one photo, square on.

Take the wiper off. Clean the oil off it. Lay it flat on a bench with the lip facing you. Then measure with calipers, not a tape, wherever the numbers are under 2 in.

Overall width and height of the backing plate.
Bolt hole diameter and centre-to-centre spacing, plus distance from the edge to the first hole.
Lip thickness at the base, and how far it stands proud of the plate.
The profile: trace it on paper against the plate edge, or photograph it end-on beside a steel rule.
Which side of the saddle it came off. Left and right wipers are often mirror images.

Can't take it off? Photograph it in place with the rule held against it, then add the machine make and model.

How the quote comes back

Old screw or torn wiper in, current part out.

You send measurements or the partFor a screw: diameter, lead, overall length, journal detail and nut flange. A drawing beats everything. For a wiper: the five measurements above.
We cross-reference to a standardScrew diameter and lead to a standard series. Wiper to a stock profile where one exists, custom where it doesn't.
Reply with grade, lead time and basisThe reply names the grade, the lead, the typical lead time and the price basis. Nothing moves until you confirm.
Ships protectedScrews go out in a tube, greased and capped. Keep the nut on the screw. If balls come out, it is a rebuild, not a refit.

We don't re-ball or regrind old screws, and we won't quote a screw without a lead and a grade on it. If your screw is worn but the machine is rare, a screw repair shop may be the cheaper route. We'll say so.

Not sure what to send? The sourcing page shows the photo that gets a match first time.

How sourcing works

Before you order

What buyers ask about screws and wipers.

Can I swap to a different lead to get more speed?

You can, but the control parameters, the servo tuning and the thrust all change. On a production machine, match the original lead. On a retrofit you are building, that is your call to make, and we'll quote what you specify.

Do you supply the support bearings too?

Ask. Angular-contact support bearings are often the same family as spindle bearings, and we quote them with class and contact angle the same way.

Who is this not for?

Anyone who needs the axis installed, aligned and backlash-compensated for them. We supply the parts. A machine tool technician does the fit.

Ball screw or way wiper

Inquiry only. A price basis comes back by phone or email and nothing is binding until you confirm.

Name

Phone

Ship-to or shop address

What you need

Diameter, lead, grade, length (optional)

Notes (optional)

You may contact me about this inquiry. I have read the privacy policy and the terms.

Or call (302) 366-0113 with the old screw on the bench.