Bowers Metrology

Special ProductsSpecial Products

Application List

3 Point Groove

2 point Groove

3 point spherical

2 point spherical

Internal threads

External Threads

Internal Splines

External Splines

Large Internal Diameters

Deep Hole systems

Gun Barrel Bore gauge

Small Blind Bore

Depth stops

Brake caliper

Internal Ball race

Internal Ball-screw

Taper Gauges

OEM

Special Forms

2 point slot width

AOA

3 Point Groove

• Available from 6-300mm diameter

• Interchangeable with standard heads

• XTA, XTD, XTH, Superbore.

• Special forms, Radius, Ball contacts.

• Depth stops available for quick location.

• Annular grooves possible.

3 point head for Baker Hughes

Groove diameter and depth inspection again Baker Hughes, Belfast.

Dimension from end of bore to front of groove. This head measures a distance not a diameter. The anvils are used to set

the datum position. Hughes Tool, Texas.

3 point groove + large range. Reed Tool, Texas

Pins extended for Annular groove. Also useful if a boss

interrupts measurement of a blind bore

3 point head to measure Brake caliper. Anvil head for Delphi China.

Close-up showing measuring position

Thread head

• Use with all Digital systems• Metric, UN, Buttress, Acme, Trapezoidal, Ball screw and

non-standard forms available.• LH and RH• Effective (Functional), Pitch & Major measurement

• Calibrate from thread rings (Plain ring for Major Diameter)

• Rings marked with actual PD

• Very fast measurement of threads

2 point Thread head. Supplied into Bowers France.

3 point thread head for Pitch diameter.

• Note single thread form!Note single thread form for pitch diameter

Note single thread form for pitch diameter

Small 2 point thread head below M10 / 3/8” with slot width head.

Ballscrew thread heads. Originally for Thomson IBL but now to TRW, ZF Steering

3 point / 2 point spherical

• Use with any digital system

• 2 point available from 3mm, 3 point available from 6mm

• Ease of use for operator

• 2 point supplied spherical as standard above 6mm

• Allows for misalignment in bore

• Tool steel anvils with XT / BS. Superbore carbide above 50mm

• Very low wear

• Always use for deep hole measurement

3 point spherical for Electro-impact used on A380

http://www.electroimpact.com/

• All Electroimpact heads are used on the large machines drilling the A380 wings. The heads are used for automated inspection of every hole machined. The head shown is manufactured with a tapered cover plate this allows for mis-alignment of head when first entering the bore. Supplied in the region of 100 off via Fowler in the US.

Close-up spherical anvil on 35-50mm head

Internal Splines

• Use with any digital system.

• 2 point between pin most popular. Can also supply with carbide ball contact. 3 point also available with irregular spacing if necessary.

• Heads for Major and Minor dia. available.

• Calibrate from standard plain rings.

• NTN (Renault supplier) largest customer with over £100K

Order for NTN 2 point between ball dimension

2 point spline head with pins on BS. This head was pre unit construction of the anvils

Deep hole Pneumatic system• Maximum depth we can measure 15metres above

50mm diameter (Pneumatic system)• Accuracy +/-0.005mm at 15 metres depth.• 6 Bar air pressure required either from compressor

or factory air supply.• Usually 3 point but can supply 2 point, all with

spherical anvils• Maximum diameter so far supplied 400mm.

• Simple operation.• All heads should have guide sleeve• Not effected by temperature fluctuations

• Calibrated prior to assembly

Deep hole XT

• Maximum depth 2 metres above 20mm diameter• Can supply as 3 point or 2 point spherical• Use 500mm long extensions 20mm+

• Use 1000mm extensions 35mm +• Can be effected by temperature.• Require same depth in front of the bore being

measured as is calibrated assembled.• Not for use for high precision inspection

• Try to use in a temperature stabilised environment.

Deep Hole Pneumatic

• Photograph to follow

Deep hole XT with 1000mm extension

Large Diameter. Two of 4 special large diameter heads produced for R.J Tubular. Largest is 18.45” - 19.45” shown with 6-8mm head in

foreground

Rivet Height Gauge

40mm Cannon Rifle groove. The angle on the face is to allow the form to follow the groove around the helix. The nose piece unscrews to allow a camera to interchange for

visual inspection

Universal Gauge. Most popular modification is longer arms. Have produced up to 300mm. Special width depth stops , larger ball contacts

are also popular.

CBG. Most popular and Longer / shorter stems. Maximum depth we recommend is 2 meters above 50mm. RA adapters can also be supplied

for CBG with photograph to follow.

Special head measure tin can internal diameter with reduced

force

View looking down inside the can showing the anvils

Product Breakdown

58%

18%

7%

17%

3-PointSpecialsUniversalOthers

Special Products Summary

• Standard Thread, Spherical and Groove prices shown in price list

• Recommend obtaining quotation if range of threads is to be measured

• Drawing to be supplied if special features are to be checked

• Please ask if unsure of application – good chance that solution has been previously provided