108 : Compac Metric Dial Test Indicator

page 108

www.longislandindicator.com

Long Island Indicator Service Inc

Precision Tool Repairs, Sales & Spare Parts

	Compac High Quality Metric Dial Test Indicator

In the 1950-60's Compac of Geneva, Switzerland, manufactured the best selling indicator and dial bore gage imports in the United States. These models were sold with the name Alina. They were so well built and such favorites of machinists of the time that, even today, we receive these indicators for repair. In Europe the indicators were sold with the name Parvus. In a misguided effort to build a sturdier gage, the manufacturer changed the models to klunkers that had all the grace of a bread box. These were the short lived IXL series.

Just a few years later, they introduced the current Compac models. They have had minor changes in the past 10 years but nothing that affected the over-all look or performance. The Compac indicator is designed to last: sturdier than the Bestest and less costly than the Interapid. It fits perfectly in-between. They are also marketed with the name Mercer, and formerly in the USA with the name SPI.

Tesa of Renens, Switzerland, is the current manufacturer of Compac indicators as well as Bestest, Tesatast and Interapid indicators.

Fyraabig1
swiss rox!

FREE CRYSTAL REPLACEMENT

with every Swiss made test indicator purchased from us you will receive a coupon good for one free crystal replacement - for any reason - at any time. Just present the coupon along with return shipping cost
and we'll take care of the rest.

The best value for your money...

Genuine Swiss indicators!

Horizontal Short Range - Single Revolution
Compac 0.002 mm Model 245G (front) and Model 245 (back) with two stem attachments. The standard contact point has 2 mm Ø carbide ball. A schematic drawing is available showing indicator dimensions. Two stem attachments T4 (4 mm) and T8 (8 mm) are included. For tolerances see bottom of this page.
Graduations	Total range	Compac number	Dial Ø	Contact point length	Order no.	List price	Your price USD

0.01 mm	0.8 mm	242	27 mm	18 mm	27738	129.00	119.00
0.01	0.8	242G	40	18 mm	27739	142.00	139.00
0.01	0.5	243GL	40	45 mm	27740	199.00	189.00
0.01	0.5	243L	27	45 mm	27741	185.00	179.00
0.002	0.2	245	27	18 mm	27746	148.00	139.00
0.002	0.2	245G	40	18 mm	27748	161.00	159.00
Extra small carbide contact point Ø 0.8 mm (select appropriate length)				18 mm	20596	26.00	19.50
				45 mm	20597	26.00	19.50
You may order online by selecting any linked model number.
Horizontal Long Range - Multiple Revolutions
These Swiss made indicators are unique with their extended range. Ideally suited for long run-outs or centering where more leeway is needed. Stem attachments T4 (4 mm) and T8 (8 mm) are included. Other sizes are available. The carbide contact point is 2 mm diameter. Compac model 215GL with 0.002 mm graduations and 2 stem attachments A schematic drawing is available showing indicator dimensions. For tolerances, see bottom of page.
Graduations	Total range	Model no.	Dial diameter	Contact point length	Order no.	List price	Your price USD

0,01mm	1,5mm	213	27mm	18mm	27703	171.00	169.00
0,01mm	1,5mm	213G	40mm	18mm	27704	190.00	189.00
0,01mm	3,0mm	212L	27mm	36mm	27702	253.00	249.00
0,01mm	3,0mm	212GL	40mm	36mm	27701	268.00	259.00
0,002mm	0,6mm	215	27mm	18mm	27709	217.00	209.00
0,002mm	0,6mm	215G	40mm	18mm	27711	233.00	229.00
0,002mm	1,2mm	215GL	40mm	36mm	28011	284.00	279.00
0,001mm	0,6mm	216G	40mm	18mm	28008	228.00	219.00
You may order online by selecting any linked model number.
Vertical Long Range - Multiple Revolutions
These rugged Swiss made indicators are unique with their extended range. Ideally suited for jig-bore work, for long run-outs or centering where more leeway is needed. Stem attachment T4 (4 mm) is included. Any standard dovetail holders or attachments will fit. Centering holder SCP and SCPA (see below) are specifically designed to hold this indicator in its vertical position. The carbide contact point included is 2 mm in diameter. Compac model 223 (left) and model 222GL with long point (right) and one stem attachment. A schematic drawing is available showing indicator dimensions. For tolerances, see bottom of page.
Graduations	Total range	Model no.	Dial diameter	Contact point length	Order no.	List price	Your price USD

0,01mm	1,5mm	223	27mm	18mm	27716	213.00	209.00
0,01mm	1,5mm	223G	40mm	18mm	27717	228.00	219.00
0,01mm	3,0mm	222L	27mm	36mm	27715	291.00	289.00
0,01mm	3,0mm	222GL	40mm	36mm	27714	310.00	309.00
0,002mm	0,6mm	225	27mm	18mm	27722	264.00	259.00
0,002mm	0,6mm	225G	40mm	18mm	27724	279.00	279.00
You may order online by selecting any linked model number.
Parallel Long Range - Multiple Revolutions
Compac model 232L shown above, with two stem attachments and box. This parallel type has a short dovetail on the far end, and a long dovetail along the under side (not seen). These parallel models are rarely in stock and require up to 4 weeks for delivery. A schematic drawing is available showing indicator dimensions. Stem attachments T4 (4 mm) and T8 (8 mm) are included. For tolerances see bottom of this page.
Graduations	Total range	Model no.	Dial diameter	Contact point length	Order no.	List price	Your price USD

0,01mm	1,5mm	233	27mm	18mm	27728	249.00	249.00
0,01mm	1,5mm	233G	40mm	18mm	27729	264.00	259.00
0,01mm	3,0mm	232L	27mm	36mm	27727	330.00	329.00
0,01mm	3,0mm	232GL	40mm	36mm	27726	343.00	339.00
0,002mm	0,6mm	235	27mm	18mm	27734	287.00	279.00
0,002mm	0,6mm	235G	40mm	18mm	27736	304.00	299.00
You may order online by selecting any linked model number.

Important calibration information
Compac models are designed to permit a true reading when the angle between the stylus and the reference surface is 0° (ie., they are parallel). Since the dial test indicator is used as a comparator, the angle can usually be set to remain at 0° for all comparisons. However, when the indicator is run through its range while attempting direct readings or for calibration, this angle will of necessity change, introducing the cosine error. In the rare cases when measurement is required with the stylus at an angle other than 0° with respect to the reference surface the readings should be corrected. Refer to calibration instructions for details. While Compac test indicators are accurate ± 1 graduation when used as a comparator, they have total allowable deviations over their entire range as follows:
Model	total range	dial configuration	total deviation	hysteresis	repeatability	measuring force

213/213G	1.5 mm	0-25-50	.013mm	.003mm	.003mm	0.35N
223/223G	1.5 mm	0-25-50	.013mm	.003mm	.003mm	0.35N
233/233G	1.5 mm	0-25-50	.013mm	.003mm	.003mm	0.35N
212L/212GL	3 mm	0-50-100	.026mm	.006mm	.003mm	0.20N
222L/222GL	3 mm	0-50-100	.026mm	.006mm	.003mm	0.20N
232L/232GL	3 mm	0-50-100	.026mm	.006mm	.003mm	0.20N
215/215G	0.6 mm	0-5-10	.013mm	.0025mm	.0015mm	0.30N
225/225G	0.6 mm	0-5-10	.013mm	.0025mm	.0015mm	0.30N
235/235G	0.6 mm	0-5-10	.013mm	.0025mm	.0015mm	0.30N
242/242G	0.8 mm	0-40-0	.013mm	.003mm	.003mm	0.25N
243L/243GL	0.5 mm	0-25-0	.013mm	.0035mm	.003mm	0.10N
245/245G	0.2 mm	0-10-0	.004mm	.002mm	.0015mm	0.25N
Source: Tesa SA, July 2003

Compac Indicator Repair

Who would buy a Rolls Royce if repairs weren't possible? Not to worry, Compac spare parts are available, in stock, and, with 50 years of experience, repairs can effectively be made on any of these Compac indicators.

For details, please refer to page 30.

Contact Point Length

It is imperative that the correct length of contact point be used with dial test indicators. Test indicators rely on leverage ratios to amplify the readings. Changing the length of the contact point will alter the ratio and result in incorrect readings. The common problem of incremental errors (ie, the readings gradually get worse from one revolution to the next) is most likely due to the installation of the wrong length point.

Most manufacturers specify the proper point length in their catalogs. It is not always clear, however, how the over-all length of the point is measured.

Compac contact points should be measured from the center of the carbide ball to the far end of the threads.

Some end-users purposely install extra-long contact points because their application requires it. If the contact point is exactly twice the length, then the readings on the dial will be doubled. Most 0,002 mm Compac indicators can be fitted with a long point which will make the graduations read 0,004 mm

Most manufacturers make indicators designed for use with long contact points. Compac test indicators have the letter designation "L" as a component of their model numbers.

Contact points can have a variety of ball diameters typically ranging from 1 mm to 3 mm and are available in carbide or ruby (special order). It is highly recommended that contact points fitted with carbide balls be used, especially for 0,002 mm indicators. The size of the ball diameter has no effect on the indicator's accuracy.

To find the ordering number for contact points refer to the contact points list on page 21.

www.longislandindicator.com

Long Island Indicator Service Inc
14 Sarah Drive — Hauppauge NY 11788 — USA